./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/seq-3.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 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 10:03:39,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 10:03:39,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 10:03:39,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 10:03:39,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 10:03:39,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 10:03:39,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 10:03:39,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 10:03:39,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 10:03:39,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 10:03:39,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 10:03:39,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 10:03:39,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 10:03:39,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 10:03:39,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 10:03:39,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 10:03:39,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 10:03:39,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 10:03:39,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 10:03:39,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 10:03:39,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 10:03:39,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 10:03:39,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 10:03:39,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 10:03:39,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 10:03:39,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 10:03:39,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 10:03:39,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 10:03:39,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 10:03:39,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 10:03:39,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 10:03:39,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 10:03:39,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 10:03:39,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 10:03:39,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 10:03:39,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 10:03:39,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 10:03:39,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 10:03:39,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 10:03:39,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 10:03:39,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 10:03:39,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 10:03:39,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 10:03:39,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 10:03:39,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 10:03:39,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 10:03:39,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 10:03:39,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 10:03:39,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 10:03:39,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 10:03:39,953 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 10:03:39,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 10:03:39,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 10:03:39,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 10:03:39,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 10:03:39,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 10:03:39,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 10:03:39,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 10:03:39,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 10:03:39,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 10:03:39,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 10:03:39,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 10:03:39,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 10:03:39,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 10:03:39,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 10:03:39,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 10:03:39,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 10:03:39,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 10:03:39,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 10:03:39,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 10:03:39,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 10:03:39,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 10:03:39,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 10:03:39,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 10:03:39,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 10:03:39,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 10:03:39,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 [2021-12-17 10:03:40,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 10:03:40,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 10:03:40,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 10:03:40,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 10:03:40,185 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 10:03:40,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/seq-3.i [2021-12-17 10:03:40,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2501c083f/3b2f506a67d344d8a6f2f85698e48886/FLAG6e0f7f03e [2021-12-17 10:03:40,647 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 10:03:40,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i [2021-12-17 10:03:40,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2501c083f/3b2f506a67d344d8a6f2f85698e48886/FLAG6e0f7f03e [2021-12-17 10:03:40,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2501c083f/3b2f506a67d344d8a6f2f85698e48886 [2021-12-17 10:03:40,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 10:03:40,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 10:03:40,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 10:03:40,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 10:03:40,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 10:03:40,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b3548f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40, skipping insertion in model container [2021-12-17 10:03:40,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 10:03:40,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 10:03:40,834 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-invgen/seq-3.i[893,906] [2021-12-17 10:03:40,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 10:03:40,854 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 10:03:40,863 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-invgen/seq-3.i[893,906] [2021-12-17 10:03:40,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 10:03:40,874 INFO L208 MainTranslator]: Completed translation [2021-12-17 10:03:40,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40 WrapperNode [2021-12-17 10:03:40,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 10:03:40,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 10:03:40,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 10:03:40,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 10:03:40,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,899 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-17 10:03:40,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 10:03:40,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 10:03:40,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 10:03:40,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 10:03:40,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 10:03:40,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 10:03:40,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 10:03:40,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 10:03:40,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (1/1) ... [2021-12-17 10:03:40,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 10:03:40,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:40,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 10:03:40,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 10:03:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 10:03:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 10:03:41,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 10:03:41,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 10:03:41,044 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 10:03:41,045 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 10:03:41,185 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 10:03:41,189 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 10:03:41,189 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 10:03:41,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:03:41 BoogieIcfgContainer [2021-12-17 10:03:41,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 10:03:41,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 10:03:41,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 10:03:41,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 10:03:41,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:03:40" (1/3) ... [2021-12-17 10:03:41,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aed5b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:03:41, skipping insertion in model container [2021-12-17 10:03:41,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:03:40" (2/3) ... [2021-12-17 10:03:41,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aed5b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:03:41, skipping insertion in model container [2021-12-17 10:03:41,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:03:41" (3/3) ... [2021-12-17 10:03:41,196 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.i [2021-12-17 10:03:41,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 10:03:41,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 10:03:41,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 10:03:41,274 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 10:03:41,274 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 10:03:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 10:03:41,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:41,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:41,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash -163175075, now seen corresponding path program 1 times [2021-12-17 10:03:41,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:41,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291640326] [2021-12-17 10:03:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:41,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:41,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291640326] [2021-12-17 10:03:41,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291640326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:03:41,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:03:41,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 10:03:41,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637091590] [2021-12-17 10:03:41,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:03:41,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 10:03:41,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 10:03:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:03:41,560 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:41,661 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2021-12-17 10:03:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 10:03:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-17 10:03:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:41,670 INFO L225 Difference]: With dead ends: 48 [2021-12-17 10:03:41,670 INFO L226 Difference]: Without dead ends: 23 [2021-12-17 10:03:41,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-17 10:03:41,674 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:41,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 60 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:03:41,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-17 10:03:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-12-17 10:03:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2021-12-17 10:03:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-17 10:03:41,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-12-17 10:03:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:41,696 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-17 10:03:41,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-17 10:03:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 10:03:41,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:41,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:41,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 10:03:41,697 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -712013865, now seen corresponding path program 1 times [2021-12-17 10:03:41,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:41,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245675967] [2021-12-17 10:03:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:41,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:41,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:41,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245675967] [2021-12-17 10:03:41,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245675967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:41,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905481414] [2021-12-17 10:03:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:41,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:41,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:41,740 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) [2021-12-17 10:03:41,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 10:03:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 10:03:41,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:41,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 10:03:41,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905481414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:03:41,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 10:03:41,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-17 10:03:41,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198121247] [2021-12-17 10:03:41,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:03:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 10:03:41,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 10:03:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:03:41,832 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:41,875 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-12-17 10:03:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 10:03:41,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-17 10:03:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:41,877 INFO L225 Difference]: With dead ends: 26 [2021-12-17 10:03:41,877 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 10:03:41,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-17 10:03:41,880 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:41,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:03:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 10:03:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2021-12-17 10:03:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-17 10:03:41,884 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-12-17 10:03:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:41,884 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-17 10:03:41,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-17 10:03:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 10:03:41,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:41,885 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:41,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 10:03:42,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:42,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1243265849, now seen corresponding path program 1 times [2021-12-17 10:03:42,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:42,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723433479] [2021-12-17 10:03:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:42,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:42,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723433479] [2021-12-17 10:03:42,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723433479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766844603] [2021-12-17 10:03:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:42,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:42,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:42,208 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) [2021-12-17 10:03:42,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 10:03:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:42,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 10:03:42,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:42,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:42,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766844603] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:42,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:42,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-17 10:03:42,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006075564] [2021-12-17 10:03:42,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:42,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 10:03:42,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:42,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 10:03:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-17 10:03:42,418 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:42,553 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-12-17 10:03:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 10:03:42,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2021-12-17 10:03:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:42,554 INFO L225 Difference]: With dead ends: 38 [2021-12-17 10:03:42,554 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 10:03:42,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-12-17 10:03:42,555 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:42,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 100 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:03:42,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 10:03:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-12-17 10:03:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-17 10:03:42,557 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2021-12-17 10:03:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:42,558 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-17 10:03:42,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-17 10:03:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 10:03:42,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:42,558 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:42,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:42,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 10:03:42,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:42,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2084334856, now seen corresponding path program 1 times [2021-12-17 10:03:42,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:42,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424273624] [2021-12-17 10:03:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:42,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:42,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:42,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424273624] [2021-12-17 10:03:42,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424273624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:42,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644113706] [2021-12-17 10:03:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:42,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:42,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:42,831 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) [2021-12-17 10:03:42,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 10:03:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:42,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 10:03:42,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:42,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:43,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644113706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:43,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:43,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-17 10:03:43,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679740887] [2021-12-17 10:03:43,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:43,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 10:03:43,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:43,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 10:03:43,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-12-17 10:03:43,018 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:43,138 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-12-17 10:03:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 10:03:43,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-12-17 10:03:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:43,140 INFO L225 Difference]: With dead ends: 50 [2021-12-17 10:03:43,140 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 10:03:43,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-12-17 10:03:43,141 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:43,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 60 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:03:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 10:03:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2021-12-17 10:03:43,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-17 10:03:43,144 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-12-17 10:03:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:43,153 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-17 10:03:43,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-17 10:03:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 10:03:43,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:43,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:43,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:43,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:43,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:43,358 INFO L85 PathProgramCache]: Analyzing trace with hash -929410893, now seen corresponding path program 2 times [2021-12-17 10:03:43,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:43,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458401099] [2021-12-17 10:03:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:43,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:43,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458401099] [2021-12-17 10:03:43,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458401099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893140505] [2021-12-17 10:03:43,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:03:43,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:43,409 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) [2021-12-17 10:03:43,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 10:03:43,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:03:43,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:43,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 10:03:43,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:43,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:43,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893140505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:43,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:43,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2021-12-17 10:03:43,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530485613] [2021-12-17 10:03:43,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:43,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 10:03:43,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 10:03:43,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 10:03:43,530 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:43,572 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-12-17 10:03:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 10:03:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 16 [2021-12-17 10:03:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:43,573 INFO L225 Difference]: With dead ends: 32 [2021-12-17 10:03:43,573 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 10:03:43,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-17 10:03:43,574 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:43,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:03:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 10:03:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-17 10:03:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-17 10:03:43,577 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-12-17 10:03:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:43,577 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-17 10:03:43,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-17 10:03:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 10:03:43,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:43,578 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:43,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:43,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:43,794 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:43,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:43,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1579087069, now seen corresponding path program 3 times [2021-12-17 10:03:43,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:43,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952414303] [2021-12-17 10:03:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:43,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:43,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:43,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952414303] [2021-12-17 10:03:43,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952414303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:43,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502196111] [2021-12-17 10:03:43,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:03:43,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:43,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:43,890 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) [2021-12-17 10:03:43,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 10:03:43,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 10:03:43,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:43,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 10:03:43,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:44,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:44,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502196111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:44,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:44,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-17 10:03:44,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847100917] [2021-12-17 10:03:44,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:44,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 10:03:44,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 10:03:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-12-17 10:03:44,155 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:44,289 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-12-17 10:03:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 10:03:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 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 19 [2021-12-17 10:03:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:44,290 INFO L225 Difference]: With dead ends: 51 [2021-12-17 10:03:44,290 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 10:03:44,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-12-17 10:03:44,292 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:44,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 90 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 10:03:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2021-12-17 10:03:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-17 10:03:44,309 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2021-12-17 10:03:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:44,309 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-17 10:03:44,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-17 10:03:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 10:03:44,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:44,310 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:44,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 10:03:44,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:44,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:44,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1678234908, now seen corresponding path program 1 times [2021-12-17 10:03:44,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:44,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316541972] [2021-12-17 10:03:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:44,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:44,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:44,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316541972] [2021-12-17 10:03:44,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316541972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:44,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754568663] [2021-12-17 10:03:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:44,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:44,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:44,593 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) [2021-12-17 10:03:44,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 10:03:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 10:03:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:44,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:44,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754568663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:44,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:44,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2021-12-17 10:03:44,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591449978] [2021-12-17 10:03:44,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:44,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 10:03:44,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:44,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 10:03:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-12-17 10:03:44,836 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:45,001 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-12-17 10:03:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 10:03:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 19 [2021-12-17 10:03:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:45,002 INFO L225 Difference]: With dead ends: 64 [2021-12-17 10:03:45,002 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 10:03:45,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-12-17 10:03:45,003 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:45,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 10:03:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2021-12-17 10:03:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-17 10:03:45,006 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2021-12-17 10:03:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:45,006 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-17 10:03:45,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-17 10:03:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 10:03:45,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:45,006 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:45,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:45,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:45,225 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1265791229, now seen corresponding path program 2 times [2021-12-17 10:03:45,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:45,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142653545] [2021-12-17 10:03:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:45,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:45,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142653545] [2021-12-17 10:03:45,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142653545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522387398] [2021-12-17 10:03:45,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:03:45,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:45,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:45,299 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) [2021-12-17 10:03:45,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 10:03:45,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:03:45,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:45,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 10:03:45,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:45,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:45,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522387398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:45,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:45,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2021-12-17 10:03:45,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756243789] [2021-12-17 10:03:45,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:45,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 10:03:45,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 10:03:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-12-17 10:03:45,503 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:45,650 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-12-17 10:03:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 10:03:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 19 [2021-12-17 10:03:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:45,651 INFO L225 Difference]: With dead ends: 79 [2021-12-17 10:03:45,651 INFO L226 Difference]: Without dead ends: 66 [2021-12-17 10:03:45,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2021-12-17 10:03:45,653 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:45,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 106 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:03:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-17 10:03:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2021-12-17 10:03:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-17 10:03:45,660 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2021-12-17 10:03:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:45,660 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-17 10:03:45,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-17 10:03:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 10:03:45,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:45,661 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:45,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:45,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:45,877 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:45,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1081918121, now seen corresponding path program 4 times [2021-12-17 10:03:45,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:45,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482599698] [2021-12-17 10:03:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:45,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:45,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:45,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482599698] [2021-12-17 10:03:45,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482599698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272880849] [2021-12-17 10:03:45,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:03:45,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:45,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:45,920 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:45,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 10:03:45,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:03:45,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 10:03:45,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:45,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:46,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272880849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:46,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:46,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-12-17 10:03:46,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767915248] [2021-12-17 10:03:46,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:46,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 10:03:46,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:46,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 10:03:46,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-17 10:03:46,027 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:46,084 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-12-17 10:03:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 10:03:46,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 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 20 [2021-12-17 10:03:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:46,085 INFO L225 Difference]: With dead ends: 38 [2021-12-17 10:03:46,085 INFO L226 Difference]: Without dead ends: 36 [2021-12-17 10:03:46,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-17 10:03:46,085 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:46,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:03:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-17 10:03:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-12-17 10:03:46,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-17 10:03:46,089 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2021-12-17 10:03:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:46,089 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-17 10:03:46,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-17 10:03:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 10:03:46,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:46,090 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:46,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:46,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 10:03:46,304 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1983310407, now seen corresponding path program 5 times [2021-12-17 10:03:46,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:46,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045450950] [2021-12-17 10:03:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:46,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:46,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:46,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045450950] [2021-12-17 10:03:46,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045450950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:46,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387678199] [2021-12-17 10:03:46,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:03:46,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:46,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:46,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:46,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 10:03:46,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 10:03:46,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:46,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 10:03:46,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:46,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:46,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387678199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:46,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:46,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-17 10:03:46,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315562677] [2021-12-17 10:03:46,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:46,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 10:03:46,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 10:03:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-12-17 10:03:46,670 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:46,812 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-12-17 10:03:46,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 10:03:46,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 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 23 [2021-12-17 10:03:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:46,812 INFO L225 Difference]: With dead ends: 64 [2021-12-17 10:03:46,812 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 10:03:46,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 10:03:46,814 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:46,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 121 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:46,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 10:03:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-12-17 10:03:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-12-17 10:03:46,817 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-12-17 10:03:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:46,818 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-12-17 10:03:46,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-12-17 10:03:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 10:03:46,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:46,819 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:46,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:47,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 10:03:47,027 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1279672712, now seen corresponding path program 2 times [2021-12-17 10:03:47,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:47,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395150621] [2021-12-17 10:03:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:47,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:47,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395150621] [2021-12-17 10:03:47,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395150621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127841589] [2021-12-17 10:03:47,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:03:47,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:47,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:47,116 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:47,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 10:03:47,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:03:47,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 10:03:47,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:47,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:47,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127841589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:47,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:47,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2021-12-17 10:03:47,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345957103] [2021-12-17 10:03:47,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:47,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 10:03:47,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:47,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 10:03:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-12-17 10:03:47,378 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:47,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:47,561 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-12-17 10:03:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 10:03:47,562 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 23 [2021-12-17 10:03:47,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:47,562 INFO L225 Difference]: With dead ends: 81 [2021-12-17 10:03:47,562 INFO L226 Difference]: Without dead ends: 65 [2021-12-17 10:03:47,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 10:03:47,563 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:47,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 133 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-17 10:03:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 31. [2021-12-17 10:03:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-12-17 10:03:47,568 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-12-17 10:03:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:47,568 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-12-17 10:03:47,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-12-17 10:03:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 10:03:47,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:47,569 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:47,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-17 10:03:47,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 10:03:47,783 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1791066585, now seen corresponding path program 3 times [2021-12-17 10:03:47,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:47,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113082923] [2021-12-17 10:03:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:47,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:47,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:47,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113082923] [2021-12-17 10:03:47,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113082923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:47,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268548870] [2021-12-17 10:03:47,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:03:47,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:47,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:47,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:47,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 10:03:47,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 10:03:47,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:47,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 10:03:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:48,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:48,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268548870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:48,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:48,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2021-12-17 10:03:48,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915198839] [2021-12-17 10:03:48,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:48,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 10:03:48,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:48,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 10:03:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-12-17 10:03:48,128 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:48,342 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-12-17 10:03:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 10:03:48,342 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 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 23 [2021-12-17 10:03:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:48,343 INFO L225 Difference]: With dead ends: 97 [2021-12-17 10:03:48,343 INFO L226 Difference]: Without dead ends: 81 [2021-12-17 10:03:48,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 10:03:48,344 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:48,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 152 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-17 10:03:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 31. [2021-12-17 10:03:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-12-17 10:03:48,349 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-12-17 10:03:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:48,349 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-12-17 10:03:48,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-12-17 10:03:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 10:03:48,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:48,350 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:48,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:48,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 10:03:48,563 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:48,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1712107944, now seen corresponding path program 3 times [2021-12-17 10:03:48,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:48,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818012690] [2021-12-17 10:03:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:48,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:48,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:48,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818012690] [2021-12-17 10:03:48,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818012690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:48,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167642238] [2021-12-17 10:03:48,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:03:48,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:48,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:48,652 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:48,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 10:03:48,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 10:03:48,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:48,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 10:03:48,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:48,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:48,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167642238] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:48,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:48,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2021-12-17 10:03:48,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935786816] [2021-12-17 10:03:48,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:48,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 10:03:48,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 10:03:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-12-17 10:03:48,909 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-12-17 10:03:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:49,093 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-12-17 10:03:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 10:03:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) Word has length 23 [2021-12-17 10:03:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:49,094 INFO L225 Difference]: With dead ends: 115 [2021-12-17 10:03:49,094 INFO L226 Difference]: Without dead ends: 99 [2021-12-17 10:03:49,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 10:03:49,095 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:49,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 119 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-17 10:03:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 33. [2021-12-17 10:03:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-17 10:03:49,100 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2021-12-17 10:03:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:49,100 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-17 10:03:49,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-12-17 10:03:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-17 10:03:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 10:03:49,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:49,101 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:49,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:49,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 10:03:49,314 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:49,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:49,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1769959117, now seen corresponding path program 6 times [2021-12-17 10:03:49,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:49,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977319343] [2021-12-17 10:03:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:49,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:49,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977319343] [2021-12-17 10:03:49,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977319343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110378431] [2021-12-17 10:03:49,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:03:49,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:49,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:49,359 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:49,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 10:03:49,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-17 10:03:49,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:49,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 10:03:49,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:49,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:49,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110378431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:49,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:49,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2021-12-17 10:03:49,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280282995] [2021-12-17 10:03:49,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:49,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 10:03:49,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:49,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 10:03:49,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-17 10:03:49,491 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:49,556 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-17 10:03:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 10:03:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 24 [2021-12-17 10:03:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:49,556 INFO L225 Difference]: With dead ends: 44 [2021-12-17 10:03:49,556 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 10:03:49,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-12-17 10:03:49,558 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:49,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 84 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:03:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 10:03:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-12-17 10:03:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-17 10:03:49,561 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2021-12-17 10:03:49,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:49,561 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-17 10:03:49,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-17 10:03:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 10:03:49,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:49,562 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:49,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:49,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 10:03:49,778 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:49,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:49,779 INFO L85 PathProgramCache]: Analyzing trace with hash 466281565, now seen corresponding path program 7 times [2021-12-17 10:03:49,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:49,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311492933] [2021-12-17 10:03:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:49,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:49,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311492933] [2021-12-17 10:03:49,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311492933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186632031] [2021-12-17 10:03:49,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:03:49,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:49,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:49,873 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:49,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 10:03:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 10:03:49,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:50,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:50,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186632031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:50,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:50,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-12-17 10:03:50,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681733932] [2021-12-17 10:03:50,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:50,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 10:03:50,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 10:03:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-12-17 10:03:50,215 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:50,386 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-12-17 10:03:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 10:03:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 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 27 [2021-12-17 10:03:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:50,387 INFO L225 Difference]: With dead ends: 77 [2021-12-17 10:03:50,387 INFO L226 Difference]: Without dead ends: 58 [2021-12-17 10:03:50,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 10:03:50,388 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:50,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 147 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-17 10:03:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-12-17 10:03:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-17 10:03:50,393 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-12-17 10:03:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:50,393 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-17 10:03:50,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-17 10:03:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 10:03:50,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:50,394 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:50,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-17 10:03:50,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:50,607 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash 397088156, now seen corresponding path program 4 times [2021-12-17 10:03:50,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:50,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931000260] [2021-12-17 10:03:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:50,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:50,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:50,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931000260] [2021-12-17 10:03:50,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931000260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183359274] [2021-12-17 10:03:50,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:03:50,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:50,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:50,717 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:50,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 10:03:50,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:03:50,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 10:03:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:51,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183359274] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:51,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:51,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2021-12-17 10:03:51,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485898797] [2021-12-17 10:03:51,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:51,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 10:03:51,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 10:03:51,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-12-17 10:03:51,020 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:51,224 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-12-17 10:03:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 10:03:51,224 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 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 27 [2021-12-17 10:03:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:51,224 INFO L225 Difference]: With dead ends: 98 [2021-12-17 10:03:51,224 INFO L226 Difference]: Without dead ends: 79 [2021-12-17 10:03:51,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 10:03:51,225 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:51,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 104 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-17 10:03:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 37. [2021-12-17 10:03:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-17 10:03:51,230 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-12-17 10:03:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:51,230 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-17 10:03:51,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-17 10:03:51,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 10:03:51,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:51,230 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:51,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:51,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 10:03:51,431 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:51,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:51,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1267711875, now seen corresponding path program 5 times [2021-12-17 10:03:51,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:51,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643197610] [2021-12-17 10:03:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:51,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:51,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:51,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643197610] [2021-12-17 10:03:51,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643197610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:51,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645548398] [2021-12-17 10:03:51,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:03:51,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:51,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:51,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:51,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 10:03:51,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 10:03:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:51,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 10:03:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:51,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:51,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645548398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:51,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:51,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2021-12-17 10:03:51,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735821574] [2021-12-17 10:03:51,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:51,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 10:03:51,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 10:03:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-12-17 10:03:51,797 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:52,032 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-12-17 10:03:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 10:03:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 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 27 [2021-12-17 10:03:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:52,033 INFO L225 Difference]: With dead ends: 118 [2021-12-17 10:03:52,033 INFO L226 Difference]: Without dead ends: 99 [2021-12-17 10:03:52,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 10:03:52,034 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:52,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 171 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-17 10:03:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 37. [2021-12-17 10:03:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-17 10:03:52,038 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-12-17 10:03:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:52,038 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-17 10:03:52,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-17 10:03:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 10:03:52,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:52,039 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:52,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:52,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 10:03:52,251 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:52,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:52,252 INFO L85 PathProgramCache]: Analyzing trace with hash 618247548, now seen corresponding path program 6 times [2021-12-17 10:03:52,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:52,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536587070] [2021-12-17 10:03:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:52,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:52,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:52,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536587070] [2021-12-17 10:03:52,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536587070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:52,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485273154] [2021-12-17 10:03:52,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:03:52,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:52,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:52,350 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:52,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 10:03:52,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 10:03:52,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:52,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 10:03:52,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:52,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:52,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485273154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:52,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:52,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2021-12-17 10:03:52,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728995628] [2021-12-17 10:03:52,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:52,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 10:03:52,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 10:03:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-12-17 10:03:52,629 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:52,855 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-12-17 10:03:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 10:03:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 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 27 [2021-12-17 10:03:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:52,856 INFO L225 Difference]: With dead ends: 137 [2021-12-17 10:03:52,856 INFO L226 Difference]: Without dead ends: 118 [2021-12-17 10:03:52,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 10:03:52,857 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:52,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 133 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-17 10:03:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 37. [2021-12-17 10:03:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-17 10:03:52,862 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-12-17 10:03:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:52,862 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-17 10:03:52,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-17 10:03:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 10:03:52,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:52,862 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:52,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:53,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 10:03:53,076 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:53,076 INFO L85 PathProgramCache]: Analyzing trace with hash 956179613, now seen corresponding path program 4 times [2021-12-17 10:03:53,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:53,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036969451] [2021-12-17 10:03:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:53,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:53,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:53,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036969451] [2021-12-17 10:03:53,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036969451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:53,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904554059] [2021-12-17 10:03:53,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:03:53,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:53,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:53,168 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:53,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 10:03:53,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:03:53,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 10:03:53,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:53,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:53,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904554059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:53,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:53,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2021-12-17 10:03:53,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439319184] [2021-12-17 10:03:53,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:53,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 10:03:53,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:53,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 10:03:53,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-12-17 10:03:53,431 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:53,631 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2021-12-17 10:03:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 10:03:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 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 27 [2021-12-17 10:03:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:53,631 INFO L225 Difference]: With dead ends: 158 [2021-12-17 10:03:53,632 INFO L226 Difference]: Without dead ends: 139 [2021-12-17 10:03:53,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 10:03:53,633 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:53,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 150 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-17 10:03:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 39. [2021-12-17 10:03:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 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) [2021-12-17 10:03:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-12-17 10:03:53,637 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2021-12-17 10:03:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:53,637 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-12-17 10:03:53,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-12-17 10:03:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 10:03:53,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:53,638 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:53,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:53,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:53,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1056697641, now seen corresponding path program 8 times [2021-12-17 10:03:53,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:53,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803798979] [2021-12-17 10:03:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:53,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:53,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:53,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803798979] [2021-12-17 10:03:53,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803798979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:53,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620471776] [2021-12-17 10:03:53,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:03:53,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:53,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:53,895 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:53,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 10:03:53,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:03:53,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:53,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 10:03:53,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:53,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:54,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620471776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:54,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:54,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-17 10:03:54,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316560188] [2021-12-17 10:03:54,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:54,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 10:03:54,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:54,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 10:03:54,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 10:03:54,036 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:54,134 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-12-17 10:03:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 10:03:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 28 [2021-12-17 10:03:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:54,135 INFO L225 Difference]: With dead ends: 50 [2021-12-17 10:03:54,135 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 10:03:54,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-12-17 10:03:54,135 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:54,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 80 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 10:03:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-12-17 10:03:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-17 10:03:54,140 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2021-12-17 10:03:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:54,140 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-17 10:03:54,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-17 10:03:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 10:03:54,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:54,141 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:54,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:54,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:54,347 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2035699769, now seen corresponding path program 9 times [2021-12-17 10:03:54,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:54,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947937830] [2021-12-17 10:03:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:54,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:54,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947937830] [2021-12-17 10:03:54,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947937830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755908647] [2021-12-17 10:03:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:03:54,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:54,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:54,484 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:54,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 10:03:54,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 10:03:54,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 10:03:54,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:54,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:54,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755908647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:54,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:54,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-17 10:03:54,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126158890] [2021-12-17 10:03:54,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:54,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 10:03:54,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 10:03:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 10:03:54,852 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:55,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:55,073 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2021-12-17 10:03:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 10:03:55,073 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-17 10:03:55,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:55,073 INFO L225 Difference]: With dead ends: 90 [2021-12-17 10:03:55,073 INFO L226 Difference]: Without dead ends: 68 [2021-12-17 10:03:55,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 10:03:55,074 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:55,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 157 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-17 10:03:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-12-17 10:03:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-17 10:03:55,079 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-12-17 10:03:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:55,079 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-17 10:03:55,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-17 10:03:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 10:03:55,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:55,080 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:55,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:55,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-17 10:03:55,280 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:55,281 INFO L85 PathProgramCache]: Analyzing trace with hash 992856568, now seen corresponding path program 7 times [2021-12-17 10:03:55,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:55,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282151325] [2021-12-17 10:03:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:55,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:55,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:55,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282151325] [2021-12-17 10:03:55,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282151325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:55,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927922736] [2021-12-17 10:03:55,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:03:55,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:55,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:55,392 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:55,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 10:03:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:55,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 10:03:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:55,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:55,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927922736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:55,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:55,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2021-12-17 10:03:55,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409958061] [2021-12-17 10:03:55,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:55,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 10:03:55,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:55,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 10:03:55,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-12-17 10:03:55,729 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:56,019 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-12-17 10:03:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 10:03:56,019 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-17 10:03:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:56,020 INFO L225 Difference]: With dead ends: 115 [2021-12-17 10:03:56,020 INFO L226 Difference]: Without dead ends: 93 [2021-12-17 10:03:56,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 10:03:56,021 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:56,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 225 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-17 10:03:56,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2021-12-17 10:03:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-17 10:03:56,038 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-12-17 10:03:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:56,039 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-17 10:03:56,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-17 10:03:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 10:03:56,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:56,042 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:56,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:56,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 10:03:56,255 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1236311129, now seen corresponding path program 8 times [2021-12-17 10:03:56,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:56,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289754192] [2021-12-17 10:03:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:56,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:56,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:56,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289754192] [2021-12-17 10:03:56,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289754192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:56,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676306281] [2021-12-17 10:03:56,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:03:56,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:56,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:56,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:56,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 10:03:56,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:03:56,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:56,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 10:03:56,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:56,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:56,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676306281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:56,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:56,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2021-12-17 10:03:56,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82820247] [2021-12-17 10:03:56,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:56,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 10:03:56,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:56,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 10:03:56,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2021-12-17 10:03:56,709 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:57,006 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2021-12-17 10:03:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 10:03:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 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 31 [2021-12-17 10:03:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:57,007 INFO L225 Difference]: With dead ends: 139 [2021-12-17 10:03:57,007 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 10:03:57,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:03:57,008 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 109 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:57,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 173 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 10:03:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 43. [2021-12-17 10:03:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-17 10:03:57,013 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-12-17 10:03:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:57,013 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-17 10:03:57,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-17 10:03:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 10:03:57,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:57,013 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:57,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:57,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:57,227 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash -834045480, now seen corresponding path program 9 times [2021-12-17 10:03:57,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:57,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902670990] [2021-12-17 10:03:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:57,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:57,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:57,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902670990] [2021-12-17 10:03:57,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902670990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:57,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866583718] [2021-12-17 10:03:57,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:03:57,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:57,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:57,324 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:57,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 10:03:57,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 10:03:57,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:57,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 10:03:57,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:57,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:57,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866583718] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:57,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:57,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2021-12-17 10:03:57,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783838854] [2021-12-17 10:03:57,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 10:03:57,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 10:03:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-12-17 10:03:57,664 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:57,971 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2021-12-17 10:03:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 10:03:57,971 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 31 [2021-12-17 10:03:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:57,972 INFO L225 Difference]: With dead ends: 162 [2021-12-17 10:03:57,972 INFO L226 Difference]: Without dead ends: 140 [2021-12-17 10:03:57,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:03:57,973 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 132 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:57,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 171 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-17 10:03:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 43. [2021-12-17 10:03:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-17 10:03:57,979 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-12-17 10:03:57,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:57,979 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-17 10:03:57,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-17 10:03:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 10:03:57,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:57,979 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:57,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-17 10:03:58,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:58,183 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:58,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1315926137, now seen corresponding path program 10 times [2021-12-17 10:03:58,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:58,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281259164] [2021-12-17 10:03:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:58,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:58,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:58,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281259164] [2021-12-17 10:03:58,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281259164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:58,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096243539] [2021-12-17 10:03:58,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:03:58,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:58,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:58,295 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:58,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 10:03:58,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:03:58,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:58,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 10:03:58,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:58,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:58,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096243539] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:58,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:58,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2021-12-17 10:03:58,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710568150] [2021-12-17 10:03:58,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:58,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 10:03:58,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:58,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 10:03:58,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-12-17 10:03:58,624 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:58,914 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2021-12-17 10:03:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 10:03:58,919 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-17 10:03:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:58,920 INFO L225 Difference]: With dead ends: 184 [2021-12-17 10:03:58,920 INFO L226 Difference]: Without dead ends: 162 [2021-12-17 10:03:58,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 10:03:58,922 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 144 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:58,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 165 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:58,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-17 10:03:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 43. [2021-12-17 10:03:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-17 10:03:58,945 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-12-17 10:03:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:58,945 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-17 10:03:58,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-17 10:03:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 10:03:58,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:58,946 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:58,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 10:03:59,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 10:03:59,146 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:03:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:03:59,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1246732728, now seen corresponding path program 5 times [2021-12-17 10:03:59,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:03:59,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465908014] [2021-12-17 10:03:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:03:59,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:03:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:03:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:59,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:03:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465908014] [2021-12-17 10:03:59,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465908014] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:03:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127919195] [2021-12-17 10:03:59,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:03:59,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:03:59,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:03:59,243 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:03:59,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 10:03:59,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 10:03:59,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:03:59,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 10:03:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:03:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:59,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:03:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:03:59,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127919195] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:03:59,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:03:59,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2021-12-17 10:03:59,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223136462] [2021-12-17 10:03:59,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:03:59,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 10:03:59,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:03:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 10:03:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-12-17 10:03:59,556 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:03:59,803 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2021-12-17 10:03:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 10:03:59,803 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-12-17 10:03:59,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:03:59,804 INFO L225 Difference]: With dead ends: 208 [2021-12-17 10:03:59,804 INFO L226 Difference]: Without dead ends: 186 [2021-12-17 10:03:59,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 10:03:59,805 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 228 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:03:59,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 129 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:03:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-17 10:03:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 45. [2021-12-17 10:03:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:59,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-12-17 10:03:59,814 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2021-12-17 10:03:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:03:59,814 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-12-17 10:03:59,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:03:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-12-17 10:03:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 10:03:59,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:03:59,815 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:03:59,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-17 10:04:00,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 10:04:00,019 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1761587635, now seen corresponding path program 10 times [2021-12-17 10:04:00,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:00,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179478773] [2021-12-17 10:04:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:00,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:00,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:00,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179478773] [2021-12-17 10:04:00,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179478773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:00,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128639360] [2021-12-17 10:04:00,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:04:00,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:00,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:00,069 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:00,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 10:04:00,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:04:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 10:04:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:00,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:00,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128639360] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:00,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:00,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-17 10:04:00,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297264410] [2021-12-17 10:04:00,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:00,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 10:04:00,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 10:04:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-17 10:04:00,215 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:00,311 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-12-17 10:04:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 10:04:00,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 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 32 [2021-12-17 10:04:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:00,311 INFO L225 Difference]: With dead ends: 56 [2021-12-17 10:04:00,312 INFO L226 Difference]: Without dead ends: 54 [2021-12-17 10:04:00,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-12-17 10:04:00,312 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:00,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 100 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-17 10:04:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-17 10:04:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-17 10:04:00,319 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 32 [2021-12-17 10:04:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:00,319 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-17 10:04:00,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-17 10:04:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:04:00,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:00,320 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:00,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:00,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 10:04:00,527 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:00,528 INFO L85 PathProgramCache]: Analyzing trace with hash -743312419, now seen corresponding path program 11 times [2021-12-17 10:04:00,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:00,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255738305] [2021-12-17 10:04:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:00,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:00,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255738305] [2021-12-17 10:04:00,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255738305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260495257] [2021-12-17 10:04:00,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:04:00,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:00,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:00,655 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:00,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 10:04:00,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-17 10:04:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:00,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 10:04:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:01,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:01,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260495257] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:01,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:01,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2021-12-17 10:04:01,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135936547] [2021-12-17 10:04:01,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:01,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 10:04:01,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:01,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 10:04:01,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 10:04:01,092 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:01,295 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2021-12-17 10:04:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 10:04:01,295 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 10:04:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:01,296 INFO L225 Difference]: With dead ends: 103 [2021-12-17 10:04:01,296 INFO L226 Difference]: Without dead ends: 78 [2021-12-17 10:04:01,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:04:01,297 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:01,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 142 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-17 10:04:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2021-12-17 10:04:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-17 10:04:01,304 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-12-17 10:04:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:01,304 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-17 10:04:01,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-17 10:04:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:04:01,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:01,304 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:01,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:01,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 10:04:01,520 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2052557284, now seen corresponding path program 11 times [2021-12-17 10:04:01,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:01,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570186351] [2021-12-17 10:04:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:01,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:01,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570186351] [2021-12-17 10:04:01,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570186351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:01,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056642440] [2021-12-17 10:04:01,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:04:01,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:01,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:01,656 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:01,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 10:04:01,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-17 10:04:01,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 10:04:01,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:01,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:02,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056642440] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:02,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:02,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2021-12-17 10:04:02,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422631172] [2021-12-17 10:04:02,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:02,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 10:04:02,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:02,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 10:04:02,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 10:04:02,059 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:02,353 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-12-17 10:04:02,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 10:04:02,353 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 10:04:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:02,353 INFO L225 Difference]: With dead ends: 132 [2021-12-17 10:04:02,353 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 10:04:02,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=622, Invalid=2684, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 10:04:02,355 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:02,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 182 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 10:04:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2021-12-17 10:04:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-17 10:04:02,362 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-12-17 10:04:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:02,362 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-17 10:04:02,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-17 10:04:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:04:02,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:02,363 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:02,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:02,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 10:04:02,563 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash 399060989, now seen corresponding path program 12 times [2021-12-17 10:04:02,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:02,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423211196] [2021-12-17 10:04:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:02,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:02,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423211196] [2021-12-17 10:04:02,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423211196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591487484] [2021-12-17 10:04:02,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:04:02,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:02,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:02,683 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:02,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 10:04:02,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 10:04:02,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:02,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 10:04:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:02,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:03,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591487484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:03,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:03,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2021-12-17 10:04:03,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383675565] [2021-12-17 10:04:03,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:03,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 10:04:03,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:03,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 10:04:03,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 10:04:03,064 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:03,385 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2021-12-17 10:04:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 10:04:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 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 35 [2021-12-17 10:04:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:03,385 INFO L225 Difference]: With dead ends: 160 [2021-12-17 10:04:03,385 INFO L226 Difference]: Without dead ends: 135 [2021-12-17 10:04:03,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=675, Invalid=2985, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 10:04:03,387 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:03,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 167 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:03,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-17 10:04:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2021-12-17 10:04:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:03,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-17 10:04:03,395 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-12-17 10:04:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:03,395 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-17 10:04:03,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-17 10:04:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:04:03,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:03,395 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:03,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-17 10:04:03,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:03,596 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:03,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1045875204, now seen corresponding path program 13 times [2021-12-17 10:04:03,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:03,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102001207] [2021-12-17 10:04:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:03,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:03,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:03,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102001207] [2021-12-17 10:04:03,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102001207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:03,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277411289] [2021-12-17 10:04:03,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:04:03,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:03,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:03,704 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:03,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 10:04:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:03,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 10:04:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:03,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:04,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277411289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:04,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:04,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2021-12-17 10:04:04,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703712381] [2021-12-17 10:04:04,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:04,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 10:04:04,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 10:04:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 10:04:04,079 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:04,445 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2021-12-17 10:04:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 10:04:04,445 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 10:04:04,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:04,445 INFO L225 Difference]: With dead ends: 187 [2021-12-17 10:04:04,445 INFO L226 Difference]: Without dead ends: 162 [2021-12-17 10:04:04,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=3089, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 10:04:04,446 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 125 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:04,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 207 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-17 10:04:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 49. [2021-12-17 10:04:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-17 10:04:04,457 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-12-17 10:04:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:04,457 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-17 10:04:04,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-17 10:04:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:04:04,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:04,457 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:04,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:04,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-17 10:04:04,658 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:04,658 INFO L85 PathProgramCache]: Analyzing trace with hash 985723933, now seen corresponding path program 14 times [2021-12-17 10:04:04,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:04,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117712149] [2021-12-17 10:04:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:04,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:04,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:04,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117712149] [2021-12-17 10:04:04,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117712149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:04,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140911886] [2021-12-17 10:04:04,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:04:04,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:04,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:04,772 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:04,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-17 10:04:04,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:04:04,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 10:04:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:05,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:05,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140911886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:05,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:05,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2021-12-17 10:04:05,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36066737] [2021-12-17 10:04:05,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:05,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 10:04:05,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:05,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 10:04:05,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 10:04:05,134 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:05,500 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2021-12-17 10:04:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 10:04:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 10:04:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:05,501 INFO L225 Difference]: With dead ends: 213 [2021-12-17 10:04:05,501 INFO L226 Difference]: Without dead ends: 188 [2021-12-17 10:04:05,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 10:04:05,502 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:05,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 163 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-17 10:04:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 49. [2021-12-17 10:04:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-17 10:04:05,513 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-12-17 10:04:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:05,513 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-17 10:04:05,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-17 10:04:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:04:05,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:05,514 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:05,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-17 10:04:05,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:05,720 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash -57119268, now seen corresponding path program 15 times [2021-12-17 10:04:05,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:05,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918407931] [2021-12-17 10:04:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:05,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:05,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:05,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918407931] [2021-12-17 10:04:05,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918407931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:05,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188935455] [2021-12-17 10:04:05,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:04:05,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:05,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:05,848 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:05,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-17 10:04:05,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-17 10:04:05,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 10:04:05,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:06,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:06,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188935455] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:06,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:06,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2021-12-17 10:04:06,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116709497] [2021-12-17 10:04:06,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:06,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 10:04:06,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 10:04:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-12-17 10:04:06,204 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:06,581 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2021-12-17 10:04:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 10:04:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 10:04:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:06,581 INFO L225 Difference]: With dead ends: 238 [2021-12-17 10:04:06,581 INFO L226 Difference]: Without dead ends: 213 [2021-12-17 10:04:06,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=618, Invalid=2688, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 10:04:06,582 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:06,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 184 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-17 10:04:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 49. [2021-12-17 10:04:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-17 10:04:06,596 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-12-17 10:04:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:06,596 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-17 10:04:06,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-17 10:04:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:04:06,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:06,597 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:06,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:06,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:06,797 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:06,797 INFO L85 PathProgramCache]: Analyzing trace with hash 186335293, now seen corresponding path program 6 times [2021-12-17 10:04:06,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:06,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43911119] [2021-12-17 10:04:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:06,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:06,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:06,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43911119] [2021-12-17 10:04:06,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43911119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:06,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630061074] [2021-12-17 10:04:06,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:04:06,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:06,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:06,928 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:06,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-17 10:04:06,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 10:04:06,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:06,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 10:04:06,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:07,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:07,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630061074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:07,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:07,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2021-12-17 10:04:07,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671939453] [2021-12-17 10:04:07,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:07,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 10:04:07,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 10:04:07,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-12-17 10:04:07,275 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:07,564 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2021-12-17 10:04:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 10:04:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 10:04:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:07,564 INFO L225 Difference]: With dead ends: 265 [2021-12-17 10:04:07,564 INFO L226 Difference]: Without dead ends: 240 [2021-12-17 10:04:07,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:04:07,565 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 206 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:07,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 184 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-17 10:04:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 51. [2021-12-17 10:04:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-12-17 10:04:07,574 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 35 [2021-12-17 10:04:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:07,574 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-12-17 10:04:07,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-12-17 10:04:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 10:04:07,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:07,575 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:07,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:07,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-17 10:04:07,775 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash 611977303, now seen corresponding path program 12 times [2021-12-17 10:04:07,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:07,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630364037] [2021-12-17 10:04:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:07,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:07,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630364037] [2021-12-17 10:04:07,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630364037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257742595] [2021-12-17 10:04:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:04:07,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:07,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:07,842 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:07,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-17 10:04:07,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 10:04:07,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:07,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 10:04:07,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:07,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:07,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257742595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:07,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:07,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2021-12-17 10:04:07,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511598990] [2021-12-17 10:04:07,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:07,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 10:04:07,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 10:04:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-17 10:04:07,984 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:08,089 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-12-17 10:04:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 10:04:08,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 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 36 [2021-12-17 10:04:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:08,091 INFO L225 Difference]: With dead ends: 62 [2021-12-17 10:04:08,091 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 10:04:08,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-12-17 10:04:08,091 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:08,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 123 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 10:04:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-12-17 10:04:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-17 10:04:08,101 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 36 [2021-12-17 10:04:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:08,101 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-17 10:04:08,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:08,101 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-17 10:04:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:04:08,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:08,101 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:08,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-17 10:04:08,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-17 10:04:08,304 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:08,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash -715494727, now seen corresponding path program 13 times [2021-12-17 10:04:08,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:08,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409359429] [2021-12-17 10:04:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:08,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:08,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:08,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409359429] [2021-12-17 10:04:08,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409359429] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:08,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831458564] [2021-12-17 10:04:08,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:04:08,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:08,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:08,447 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:08,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-17 10:04:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:08,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:04:08,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:08,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:08,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831458564] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:08,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:08,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2021-12-17 10:04:08,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214977869] [2021-12-17 10:04:08,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:08,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 10:04:08,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 10:04:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 10:04:08,942 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:09,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:09,242 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-12-17 10:04:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 10:04:09,242 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-17 10:04:09,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:09,243 INFO L225 Difference]: With dead ends: 116 [2021-12-17 10:04:09,243 INFO L226 Difference]: Without dead ends: 88 [2021-12-17 10:04:09,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 10:04:09,244 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:09,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 177 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:09,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-17 10:04:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2021-12-17 10:04:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-17 10:04:09,259 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-12-17 10:04:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:09,259 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-17 10:04:09,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-17 10:04:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:04:09,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:09,260 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:09,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-17 10:04:09,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-17 10:04:09,460 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash -944261768, now seen corresponding path program 16 times [2021-12-17 10:04:09,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:09,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940638657] [2021-12-17 10:04:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:09,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:09,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940638657] [2021-12-17 10:04:09,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940638657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427271076] [2021-12-17 10:04:09,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:04:09,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:09,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:09,609 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:09,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-17 10:04:09,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:04:09,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:04:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:10,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:10,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427271076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:10,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:10,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2021-12-17 10:04:10,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413313437] [2021-12-17 10:04:10,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:10,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 10:04:10,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 10:04:10,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 10:04:10,111 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:10,462 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2021-12-17 10:04:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 10:04:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-17 10:04:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:10,462 INFO L225 Difference]: With dead ends: 149 [2021-12-17 10:04:10,462 INFO L226 Difference]: Without dead ends: 121 [2021-12-17 10:04:10,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=770, Invalid=3390, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:04:10,463 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:10,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 179 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-17 10:04:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 55. [2021-12-17 10:04:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-17 10:04:10,475 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-12-17 10:04:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:10,475 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-17 10:04:10,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-17 10:04:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:04:10,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:10,475 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:10,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:10,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:10,676 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:10,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2060020007, now seen corresponding path program 17 times [2021-12-17 10:04:10,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:10,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623052633] [2021-12-17 10:04:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:10,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:10,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:10,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623052633] [2021-12-17 10:04:10,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623052633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772154942] [2021-12-17 10:04:10,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:04:10,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:10,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:10,802 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:10,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-17 10:04:10,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 10:04:10,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:04:10,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:11,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:11,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772154942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:11,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:11,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2021-12-17 10:04:11,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242976688] [2021-12-17 10:04:11,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:11,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 10:04:11,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:11,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 10:04:11,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 10:04:11,239 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:11,679 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2021-12-17 10:04:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 10:04:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 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 39 [2021-12-17 10:04:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:11,680 INFO L225 Difference]: With dead ends: 181 [2021-12-17 10:04:11,680 INFO L226 Difference]: Without dead ends: 153 [2021-12-17 10:04:11,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=851, Invalid=3841, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 10:04:11,681 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:11,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 275 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-17 10:04:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 55. [2021-12-17 10:04:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-17 10:04:11,694 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-12-17 10:04:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:11,694 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-17 10:04:11,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-17 10:04:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:04:11,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:11,695 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:11,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:11,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-17 10:04:11,911 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1818917544, now seen corresponding path program 18 times [2021-12-17 10:04:11,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:11,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83384647] [2021-12-17 10:04:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:11,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:12,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:12,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83384647] [2021-12-17 10:04:12,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83384647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:12,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363647510] [2021-12-17 10:04:12,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:04:12,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:12,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:12,053 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:12,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-17 10:04:12,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-17 10:04:12,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:12,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:04:12,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:12,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:12,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363647510] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:12,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:12,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2021-12-17 10:04:12,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281542105] [2021-12-17 10:04:12,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:12,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-17 10:04:12,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-17 10:04:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 10:04:12,492 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:12,933 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2021-12-17 10:04:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 10:04:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 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 39 [2021-12-17 10:04:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:12,934 INFO L225 Difference]: With dead ends: 212 [2021-12-17 10:04:12,934 INFO L226 Difference]: Without dead ends: 184 [2021-12-17 10:04:12,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=894, Invalid=4076, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 10:04:12,934 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:12,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 195 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-17 10:04:12,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 55. [2021-12-17 10:04:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-17 10:04:12,949 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-12-17 10:04:12,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:12,949 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-17 10:04:12,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:12,949 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-17 10:04:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:04:12,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:12,950 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:12,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:13,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-17 10:04:13,165 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:13,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash 544164601, now seen corresponding path program 19 times [2021-12-17 10:04:13,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:13,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380398624] [2021-12-17 10:04:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:13,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:13,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380398624] [2021-12-17 10:04:13,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380398624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193400625] [2021-12-17 10:04:13,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:04:13,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:13,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:13,295 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:13,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-17 10:04:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:13,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:04:13,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:13,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:13,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193400625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:13,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:13,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2021-12-17 10:04:13,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131900151] [2021-12-17 10:04:13,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:13,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 10:04:13,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 10:04:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 10:04:13,722 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:14,195 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2021-12-17 10:04:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 10:04:14,195 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-17 10:04:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:14,196 INFO L225 Difference]: With dead ends: 242 [2021-12-17 10:04:14,196 INFO L226 Difference]: Without dead ends: 214 [2021-12-17 10:04:14,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=893, Invalid=4077, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 10:04:14,197 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 160 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:14,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 184 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-17 10:04:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 55. [2021-12-17 10:04:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-17 10:04:14,215 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-12-17 10:04:14,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:14,215 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-17 10:04:14,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-17 10:04:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:04:14,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:14,216 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:14,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:14,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-17 10:04:14,416 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:14,417 INFO L85 PathProgramCache]: Analyzing trace with hash -765080264, now seen corresponding path program 20 times [2021-12-17 10:04:14,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:14,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791858743] [2021-12-17 10:04:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:14,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:14,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791858743] [2021-12-17 10:04:14,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791858743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084637978] [2021-12-17 10:04:14,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:04:14,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:14,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:14,547 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:14,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-17 10:04:14,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:04:14,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:04:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:14,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:14,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084637978] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:14,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:14,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2021-12-17 10:04:14,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341275646] [2021-12-17 10:04:14,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:14,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 10:04:14,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 10:04:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 10:04:14,956 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:15,411 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2021-12-17 10:04:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 10:04:15,411 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 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 39 [2021-12-17 10:04:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:15,412 INFO L225 Difference]: With dead ends: 271 [2021-12-17 10:04:15,412 INFO L226 Difference]: Without dead ends: 243 [2021-12-17 10:04:15,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=848, Invalid=3844, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 10:04:15,413 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 162 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:15,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 237 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-17 10:04:15,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 55. [2021-12-17 10:04:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-17 10:04:15,429 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-12-17 10:04:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:15,429 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-17 10:04:15,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-17 10:04:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:04:15,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:15,430 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:15,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:15,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-17 10:04:15,643 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1686538009, now seen corresponding path program 21 times [2021-12-17 10:04:15,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:15,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173862096] [2021-12-17 10:04:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:15,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:15,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:15,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173862096] [2021-12-17 10:04:15,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173862096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:15,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574347814] [2021-12-17 10:04:15,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:04:15,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:15,778 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:15,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-17 10:04:15,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-17 10:04:15,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:15,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:04:15,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:16,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:16,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574347814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:16,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:16,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2021-12-17 10:04:16,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909500213] [2021-12-17 10:04:16,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:16,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 10:04:16,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 10:04:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 10:04:16,162 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:16,617 INFO L93 Difference]: Finished difference Result 299 states and 316 transitions. [2021-12-17 10:04:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 10:04:16,617 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-17 10:04:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:16,617 INFO L225 Difference]: With dead ends: 299 [2021-12-17 10:04:16,618 INFO L226 Difference]: Without dead ends: 271 [2021-12-17 10:04:16,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:04:16,618 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 214 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:16,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 219 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-17 10:04:16,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 55. [2021-12-17 10:04:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-17 10:04:16,633 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-12-17 10:04:16,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:16,633 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-17 10:04:16,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-17 10:04:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 10:04:16,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:16,634 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:16,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:16,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:16,847 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash 241601816, now seen corresponding path program 7 times [2021-12-17 10:04:16,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:16,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455988091] [2021-12-17 10:04:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:16,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:17,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:17,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455988091] [2021-12-17 10:04:17,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455988091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:17,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676338853] [2021-12-17 10:04:17,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:04:17,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:17,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:17,028 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:17,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-17 10:04:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:17,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 10:04:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:17,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:17,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676338853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:17,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:17,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2021-12-17 10:04:17,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820313747] [2021-12-17 10:04:17,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:17,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 10:04:17,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 10:04:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 10:04:17,429 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:17,786 INFO L93 Difference]: Finished difference Result 329 states and 348 transitions. [2021-12-17 10:04:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 10:04:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-17 10:04:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:17,787 INFO L225 Difference]: With dead ends: 329 [2021-12-17 10:04:17,787 INFO L226 Difference]: Without dead ends: 301 [2021-12-17 10:04:17,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 10:04:17,788 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 296 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:17,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 148 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-17 10:04:17,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 57. [2021-12-17 10:04:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-17 10:04:17,803 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 39 [2021-12-17 10:04:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:17,803 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-17 10:04:17,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-17 10:04:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 10:04:17,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:17,804 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:17,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:18,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:18,019 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1565543885, now seen corresponding path program 14 times [2021-12-17 10:04:18,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:18,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096203555] [2021-12-17 10:04:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:18,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:18,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:18,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096203555] [2021-12-17 10:04:18,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096203555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:18,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487011596] [2021-12-17 10:04:18,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:04:18,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:18,088 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:18,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-17 10:04:18,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:04:18,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:18,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 10:04:18,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:18,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487011596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:18,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:18,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2021-12-17 10:04:18,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249581497] [2021-12-17 10:04:18,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:18,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 10:04:18,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 10:04:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-17 10:04:18,261 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:18,385 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-12-17 10:04:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 10:04:18,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 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 40 [2021-12-17 10:04:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:18,386 INFO L225 Difference]: With dead ends: 68 [2021-12-17 10:04:18,386 INFO L226 Difference]: Without dead ends: 66 [2021-12-17 10:04:18,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-12-17 10:04:18,386 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:18,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 149 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-17 10:04:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-17 10:04:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-12-17 10:04:18,406 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2021-12-17 10:04:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:18,406 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-12-17 10:04:18,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:18,406 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-12-17 10:04:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:04:18,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:18,407 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:18,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-17 10:04:18,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-17 10:04:18,607 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:18,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash -63167651, now seen corresponding path program 15 times [2021-12-17 10:04:18,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:18,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123322451] [2021-12-17 10:04:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:18,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:18,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:18,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123322451] [2021-12-17 10:04:18,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123322451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:18,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48925908] [2021-12-17 10:04:18,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:04:18,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:18,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:18,775 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:18,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-17 10:04:18,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 10:04:18,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:18,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:04:18,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:19,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:19,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48925908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:19,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:19,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-12-17 10:04:19,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309393177] [2021-12-17 10:04:19,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:19,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 10:04:19,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 10:04:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 10:04:19,330 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:19,620 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-12-17 10:04:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 10:04:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 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 43 [2021-12-17 10:04:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:19,621 INFO L225 Difference]: With dead ends: 129 [2021-12-17 10:04:19,621 INFO L226 Difference]: Without dead ends: 98 [2021-12-17 10:04:19,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:04:19,621 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:19,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 153 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:19,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-17 10:04:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-12-17 10:04:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-17 10:04:19,639 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-12-17 10:04:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:19,639 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-17 10:04:19,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-17 10:04:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:04:19,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:19,640 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:19,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-17 10:04:19,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-17 10:04:19,845 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:19,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:19,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1788348772, now seen corresponding path program 22 times [2021-12-17 10:04:19,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:19,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123526880] [2021-12-17 10:04:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:19,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:20,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:20,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123526880] [2021-12-17 10:04:20,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123526880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:20,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116445911] [2021-12-17 10:04:20,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:04:20,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:20,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:20,028 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:20,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-17 10:04:20,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:04:20,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:20,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:04:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:20,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:20,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116445911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:20,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:20,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2021-12-17 10:04:20,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378776430] [2021-12-17 10:04:20,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:20,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 10:04:20,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 10:04:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 10:04:20,560 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:20,983 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2021-12-17 10:04:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 10:04:20,983 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 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 43 [2021-12-17 10:04:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:20,984 INFO L225 Difference]: With dead ends: 166 [2021-12-17 10:04:20,984 INFO L226 Difference]: Without dead ends: 135 [2021-12-17 10:04:20,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=934, Invalid=4178, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 10:04:20,985 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:20,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 178 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-17 10:04:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2021-12-17 10:04:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-17 10:04:21,023 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-12-17 10:04:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:21,024 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-17 10:04:21,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-17 10:04:21,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:04:21,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:21,024 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:21,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-17 10:04:21,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-17 10:04:21,240 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:21,241 INFO L85 PathProgramCache]: Analyzing trace with hash -874168451, now seen corresponding path program 23 times [2021-12-17 10:04:21,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:21,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076867404] [2021-12-17 10:04:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:21,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:21,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076867404] [2021-12-17 10:04:21,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076867404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056112198] [2021-12-17 10:04:21,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:04:21,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:21,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:21,406 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:21,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-17 10:04:21,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-17 10:04:21,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:21,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:04:21,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:21,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:21,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056112198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:21,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:21,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2021-12-17 10:04:21,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025397227] [2021-12-17 10:04:21,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:21,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 10:04:21,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 10:04:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 10:04:21,916 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:22,395 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2021-12-17 10:04:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 10:04:22,395 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 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 43 [2021-12-17 10:04:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:22,395 INFO L225 Difference]: With dead ends: 202 [2021-12-17 10:04:22,396 INFO L226 Difference]: Without dead ends: 171 [2021-12-17 10:04:22,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 10:04:22,396 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 88 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:22,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 230 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:22,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-17 10:04:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 61. [2021-12-17 10:04:22,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-17 10:04:22,416 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-12-17 10:04:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:22,416 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-17 10:04:22,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-17 10:04:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:04:22,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:22,417 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:22,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:22,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:22,621 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:22,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1675962756, now seen corresponding path program 24 times [2021-12-17 10:04:22,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:22,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943775502] [2021-12-17 10:04:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:22,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:22,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943775502] [2021-12-17 10:04:22,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943775502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:22,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260396599] [2021-12-17 10:04:22,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:04:22,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:22,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:22,764 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:22,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-17 10:04:22,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 10:04:22,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:04:22,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:23,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:23,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260396599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:23,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:23,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2021-12-17 10:04:23,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483361818] [2021-12-17 10:04:23,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:23,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 10:04:23,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:23,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 10:04:23,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 10:04:23,270 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 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) [2021-12-17 10:04:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:23,777 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2021-12-17 10:04:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 10:04:23,778 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 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) Word has length 43 [2021-12-17 10:04:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:23,778 INFO L225 Difference]: With dead ends: 237 [2021-12-17 10:04:23,778 INFO L226 Difference]: Without dead ends: 206 [2021-12-17 10:04:23,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1122, Invalid=5198, Unknown=0, NotChecked=0, Total=6320 [2021-12-17 10:04:23,779 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:23,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 202 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-17 10:04:23,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 61. [2021-12-17 10:04:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-17 10:04:23,808 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-12-17 10:04:23,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:23,808 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-17 10:04:23,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 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) [2021-12-17 10:04:23,808 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-17 10:04:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:04:23,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:23,808 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:23,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-17 10:04:24,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-17 10:04:24,024 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash -177806435, now seen corresponding path program 25 times [2021-12-17 10:04:24,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:24,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484779723] [2021-12-17 10:04:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:24,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:24,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:24,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484779723] [2021-12-17 10:04:24,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484779723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:24,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953953988] [2021-12-17 10:04:24,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:04:24,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:24,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:24,187 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:24,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-17 10:04:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:24,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:04:24,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:24,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:24,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953953988] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:24,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:24,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2021-12-17 10:04:24,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384534978] [2021-12-17 10:04:24,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:24,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 10:04:24,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:24,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 10:04:24,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 10:04:24,664 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:25,212 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2021-12-17 10:04:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 10:04:25,212 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 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 43 [2021-12-17 10:04:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:25,212 INFO L225 Difference]: With dead ends: 271 [2021-12-17 10:04:25,212 INFO L226 Difference]: Without dead ends: 240 [2021-12-17 10:04:25,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1147, Invalid=5333, Unknown=0, NotChecked=0, Total=6480 [2021-12-17 10:04:25,213 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 155 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:25,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 195 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-17 10:04:25,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 61. [2021-12-17 10:04:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-17 10:04:25,234 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-12-17 10:04:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:25,235 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-17 10:04:25,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-17 10:04:25,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:04:25,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:25,235 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:25,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-17 10:04:25,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-17 10:04:25,436 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:25,436 INFO L85 PathProgramCache]: Analyzing trace with hash -406573476, now seen corresponding path program 26 times [2021-12-17 10:04:25,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:25,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040945589] [2021-12-17 10:04:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:25,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:25,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040945589] [2021-12-17 10:04:25,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040945589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345021856] [2021-12-17 10:04:25,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:04:25,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:25,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:25,600 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:25,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-17 10:04:25,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:04:25,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:04:25,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:25,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:26,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345021856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:26,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:26,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2021-12-17 10:04:26,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38867986] [2021-12-17 10:04:26,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:26,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 10:04:26,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:26,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 10:04:26,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 10:04:26,078 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:26,685 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2021-12-17 10:04:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 10:04:26,685 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-12-17 10:04:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:26,685 INFO L225 Difference]: With dead ends: 304 [2021-12-17 10:04:26,686 INFO L226 Difference]: Without dead ends: 273 [2021-12-17 10:04:26,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1120, Invalid=5200, Unknown=0, NotChecked=0, Total=6320 [2021-12-17 10:04:26,686 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 218 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:26,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 227 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-17 10:04:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 61. [2021-12-17 10:04:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-17 10:04:26,709 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-12-17 10:04:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:26,709 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-17 10:04:26,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-17 10:04:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:04:26,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:26,710 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:26,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-17 10:04:26,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-17 10:04:26,923 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:26,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1522331715, now seen corresponding path program 27 times [2021-12-17 10:04:26,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:26,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517635355] [2021-12-17 10:04:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:26,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:27,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:27,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517635355] [2021-12-17 10:04:27,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517635355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:27,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102830658] [2021-12-17 10:04:27,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:04:27,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:27,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:27,099 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:27,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-17 10:04:27,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 10:04:27,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:04:27,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:27,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102830658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:27,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:27,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2021-12-17 10:04:27,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742922597] [2021-12-17 10:04:27,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:27,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 10:04:27,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:27,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 10:04:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 10:04:27,555 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:28,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:28,122 INFO L93 Difference]: Finished difference Result 336 states and 354 transitions. [2021-12-17 10:04:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 10:04:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 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 43 [2021-12-17 10:04:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:28,123 INFO L225 Difference]: With dead ends: 336 [2021-12-17 10:04:28,123 INFO L226 Difference]: Without dead ends: 305 [2021-12-17 10:04:28,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1044, Invalid=4808, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 10:04:28,123 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 229 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:28,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 206 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-17 10:04:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 61. [2021-12-17 10:04:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-17 10:04:28,145 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-12-17 10:04:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:28,145 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-17 10:04:28,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-17 10:04:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:04:28,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:28,146 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:28,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-17 10:04:28,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-17 10:04:28,352 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1281229252, now seen corresponding path program 28 times [2021-12-17 10:04:28,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:28,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713032071] [2021-12-17 10:04:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:28,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:28,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:28,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713032071] [2021-12-17 10:04:28,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713032071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:28,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015844] [2021-12-17 10:04:28,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:04:28,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:28,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:28,513 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:28,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-17 10:04:28,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:04:28,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:04:28,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:28,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:28,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:28,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:28,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2021-12-17 10:04:28,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749914504] [2021-12-17 10:04:28,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:28,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-17 10:04:28,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-17 10:04:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 10:04:28,963 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:29,530 INFO L93 Difference]: Finished difference Result 367 states and 386 transitions. [2021-12-17 10:04:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 10:04:29,530 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 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 43 [2021-12-17 10:04:29,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:29,531 INFO L225 Difference]: With dead ends: 367 [2021-12-17 10:04:29,531 INFO L226 Difference]: Without dead ends: 336 [2021-12-17 10:04:29,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=928, Invalid=4184, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 10:04:29,531 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 206 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:29,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 254 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-17 10:04:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 61. [2021-12-17 10:04:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-17 10:04:29,557 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-12-17 10:04:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:29,557 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-17 10:04:29,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-17 10:04:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 10:04:29,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:29,557 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:29,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-17 10:04:29,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:29,758 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:29,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:29,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1081852893, now seen corresponding path program 8 times [2021-12-17 10:04:29,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:29,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653038336] [2021-12-17 10:04:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:29,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:29,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:29,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653038336] [2021-12-17 10:04:29,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653038336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:29,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977697766] [2021-12-17 10:04:29,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:04:29,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:29,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:29,921 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:29,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-17 10:04:29,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:04:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 10:04:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:30,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:30,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977697766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:30,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:30,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2021-12-17 10:04:30,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894023700] [2021-12-17 10:04:30,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:30,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 10:04:30,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 10:04:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 10:04:30,338 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:30,807 INFO L93 Difference]: Finished difference Result 400 states and 421 transitions. [2021-12-17 10:04:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 10:04:30,807 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-17 10:04:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:30,808 INFO L225 Difference]: With dead ends: 400 [2021-12-17 10:04:30,808 INFO L226 Difference]: Without dead ends: 369 [2021-12-17 10:04:30,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:04:30,809 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:30,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 180 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-17 10:04:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 63. [2021-12-17 10:04:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-12-17 10:04:30,834 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2021-12-17 10:04:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:30,834 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-12-17 10:04:30,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-12-17 10:04:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 10:04:30,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:30,834 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:30,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-17 10:04:31,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-17 10:04:31,039 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:31,040 INFO L85 PathProgramCache]: Analyzing trace with hash 105717207, now seen corresponding path program 16 times [2021-12-17 10:04:31,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:31,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520737845] [2021-12-17 10:04:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:31,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:31,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520737845] [2021-12-17 10:04:31,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520737845] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501160138] [2021-12-17 10:04:31,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:04:31,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:31,116 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:31,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-17 10:04:31,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:04:31,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:31,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 10:04:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:31,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:31,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501160138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:31,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:31,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2021-12-17 10:04:31,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324808416] [2021-12-17 10:04:31,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:31,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 10:04:31,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:31,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 10:04:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 10:04:31,317 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:31,468 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-12-17 10:04:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 10:04:31,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 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 44 [2021-12-17 10:04:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:31,468 INFO L225 Difference]: With dead ends: 74 [2021-12-17 10:04:31,469 INFO L226 Difference]: Without dead ends: 72 [2021-12-17 10:04:31,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2021-12-17 10:04:31,469 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:31,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 154 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-17 10:04:31,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2021-12-17 10:04:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-12-17 10:04:31,495 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 44 [2021-12-17 10:04:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:31,495 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-12-17 10:04:31,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-12-17 10:04:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:31,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:31,496 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:31,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-17 10:04:31,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:31,711 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1215128889, now seen corresponding path program 17 times [2021-12-17 10:04:31,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:31,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687112471] [2021-12-17 10:04:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:31,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:31,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:31,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687112471] [2021-12-17 10:04:31,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687112471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:31,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417108735] [2021-12-17 10:04:31,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:04:31,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:31,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:31,899 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:31,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-17 10:04:31,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-17 10:04:31,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:31,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:32,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:32,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417108735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:32,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:32,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-17 10:04:32,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166032658] [2021-12-17 10:04:32,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:32,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 10:04:32,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:32,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 10:04:32,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 10:04:32,492 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:32,846 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2021-12-17 10:04:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 10:04:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 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 47 [2021-12-17 10:04:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:32,847 INFO L225 Difference]: With dead ends: 142 [2021-12-17 10:04:32,847 INFO L226 Difference]: Without dead ends: 108 [2021-12-17 10:04:32,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=950, Invalid=4020, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 10:04:32,848 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:32,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-17 10:04:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2021-12-17 10:04:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-17 10:04:32,875 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-12-17 10:04:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:32,875 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-17 10:04:32,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-17 10:04:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:32,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:32,876 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:32,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:33,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:33,091 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash -185630472, now seen corresponding path program 29 times [2021-12-17 10:04:33,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:33,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185958691] [2021-12-17 10:04:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:33,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:33,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185958691] [2021-12-17 10:04:33,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185958691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369482953] [2021-12-17 10:04:33,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:04:33,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:33,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:33,280 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:33,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-17 10:04:33,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-17 10:04:33,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:33,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:33,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:33,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:33,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369482953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:33,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:33,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2021-12-17 10:04:33,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927142685] [2021-12-17 10:04:33,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:33,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-17 10:04:33,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:33,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-17 10:04:33,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 10:04:33,862 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:34,382 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2021-12-17 10:04:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 10:04:34,382 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 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 47 [2021-12-17 10:04:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:34,382 INFO L225 Difference]: With dead ends: 183 [2021-12-17 10:04:34,382 INFO L226 Difference]: Without dead ends: 149 [2021-12-17 10:04:34,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1114, Invalid=5048, Unknown=0, NotChecked=0, Total=6162 [2021-12-17 10:04:34,383 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 68 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:34,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 215 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-17 10:04:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2021-12-17 10:04:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-17 10:04:34,413 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-12-17 10:04:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:34,413 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-17 10:04:34,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-17 10:04:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:34,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:34,413 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:34,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-17 10:04:34,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:34,615 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1477742247, now seen corresponding path program 30 times [2021-12-17 10:04:34,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:34,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330323411] [2021-12-17 10:04:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:34,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:34,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:34,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330323411] [2021-12-17 10:04:34,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330323411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:34,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618659958] [2021-12-17 10:04:34,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:04:34,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:34,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:34,807 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:34,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-17 10:04:34,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-17 10:04:34,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:34,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:34,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:35,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:35,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618659958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:35,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:35,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2021-12-17 10:04:35,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698260059] [2021-12-17 10:04:35,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:35,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 10:04:35,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:35,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 10:04:35,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 10:04:35,357 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:35,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:35,934 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2021-12-17 10:04:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 10:04:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-17 10:04:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:35,935 INFO L225 Difference]: With dead ends: 223 [2021-12-17 10:04:35,935 INFO L226 Difference]: Without dead ends: 189 [2021-12-17 10:04:35,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2314 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1266, Invalid=5874, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 10:04:35,935 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:35,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 232 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-17 10:04:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 67. [2021-12-17 10:04:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-17 10:04:35,966 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-12-17 10:04:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:35,966 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-17 10:04:35,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-17 10:04:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:35,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:35,967 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:35,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:36,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:36,179 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1519423272, now seen corresponding path program 31 times [2021-12-17 10:04:36,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:36,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852747468] [2021-12-17 10:04:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:36,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:36,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:36,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852747468] [2021-12-17 10:04:36,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852747468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:36,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15281992] [2021-12-17 10:04:36,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:04:36,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:36,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:36,365 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:36,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-17 10:04:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:36,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:36,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:36,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15281992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:36,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:36,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2021-12-17 10:04:36,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172734245] [2021-12-17 10:04:36,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:36,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 10:04:36,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 10:04:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 10:04:36,938 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:37,579 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2021-12-17 10:04:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 10:04:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-17 10:04:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:37,580 INFO L225 Difference]: With dead ends: 262 [2021-12-17 10:04:37,580 INFO L226 Difference]: Without dead ends: 228 [2021-12-17 10:04:37,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1377, Invalid=6455, Unknown=0, NotChecked=0, Total=7832 [2021-12-17 10:04:37,581 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:37,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 257 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-17 10:04:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 67. [2021-12-17 10:04:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-17 10:04:37,615 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-12-17 10:04:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:37,615 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-17 10:04:37,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-17 10:04:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:37,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:37,615 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:37,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:37,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-17 10:04:37,819 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 834536825, now seen corresponding path program 32 times [2021-12-17 10:04:37,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:37,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95652980] [2021-12-17 10:04:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:37,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:37,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:37,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95652980] [2021-12-17 10:04:37,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95652980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:37,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789057461] [2021-12-17 10:04:37,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:04:37,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:37,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:37,997 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:37,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-17 10:04:38,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:04:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:38,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:38,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:38,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789057461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:38,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:38,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2021-12-17 10:04:38,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85235977] [2021-12-17 10:04:38,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:38,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 10:04:38,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:38,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 10:04:38,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 10:04:38,512 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:39,227 INFO L93 Difference]: Finished difference Result 300 states and 317 transitions. [2021-12-17 10:04:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 10:04:39,227 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-17 10:04:39,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:39,228 INFO L225 Difference]: With dead ends: 300 [2021-12-17 10:04:39,228 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 10:04:39,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2697 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1435, Invalid=6755, Unknown=0, NotChecked=0, Total=8190 [2021-12-17 10:04:39,229 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 158 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:39,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 256 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 10:04:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 67. [2021-12-17 10:04:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-17 10:04:39,271 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-12-17 10:04:39,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:39,271 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-17 10:04:39,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:39,272 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-17 10:04:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:39,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:39,272 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:39,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:39,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-17 10:04:39,487 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:39,488 INFO L85 PathProgramCache]: Analyzing trace with hash -890644296, now seen corresponding path program 33 times [2021-12-17 10:04:39,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:39,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046406414] [2021-12-17 10:04:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:39,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:39,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:39,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046406414] [2021-12-17 10:04:39,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046406414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:39,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719406951] [2021-12-17 10:04:39,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:04:39,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:39,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:39,659 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:39,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-17 10:04:39,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 10:04:39,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:39,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:39,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:40,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:40,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719406951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:40,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:40,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2021-12-17 10:04:40,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329682954] [2021-12-17 10:04:40,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:40,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 10:04:40,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:40,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 10:04:40,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 10:04:40,211 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:40,980 INFO L93 Difference]: Finished difference Result 337 states and 355 transitions. [2021-12-17 10:04:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 10:04:40,980 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-12-17 10:04:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:40,980 INFO L225 Difference]: With dead ends: 337 [2021-12-17 10:04:40,981 INFO L226 Difference]: Without dead ends: 303 [2021-12-17 10:04:40,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1434, Invalid=6756, Unknown=0, NotChecked=0, Total=8190 [2021-12-17 10:04:40,981 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:40,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 236 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-17 10:04:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 67. [2021-12-17 10:04:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-17 10:04:41,018 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-12-17 10:04:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:41,019 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-17 10:04:41,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:41,019 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-17 10:04:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:41,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:41,019 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:41,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-17 10:04:41,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-17 10:04:41,220 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:41,220 INFO L85 PathProgramCache]: Analyzing trace with hash 23536025, now seen corresponding path program 34 times [2021-12-17 10:04:41,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:41,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109225654] [2021-12-17 10:04:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:41,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:41,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:41,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109225654] [2021-12-17 10:04:41,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109225654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:41,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971318548] [2021-12-17 10:04:41,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:04:41,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:41,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:41,398 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:41,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-17 10:04:41,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:04:41,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:41,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:41,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:41,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971318548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:41,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:41,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2021-12-17 10:04:41,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901129892] [2021-12-17 10:04:41,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:41,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 10:04:41,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:41,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 10:04:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 10:04:41,900 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:42,646 INFO L93 Difference]: Finished difference Result 373 states and 392 transitions. [2021-12-17 10:04:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 10:04:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 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 47 [2021-12-17 10:04:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:42,651 INFO L225 Difference]: With dead ends: 373 [2021-12-17 10:04:42,651 INFO L226 Difference]: Without dead ends: 339 [2021-12-17 10:04:42,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1374, Invalid=6458, Unknown=0, NotChecked=0, Total=7832 [2021-12-17 10:04:42,652 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 190 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:42,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 247 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-17 10:04:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 67. [2021-12-17 10:04:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-17 10:04:42,687 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-12-17 10:04:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:42,687 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-17 10:04:42,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-17 10:04:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:42,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:42,687 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:42,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-17 10:04:42,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:42,901 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:42,901 INFO L85 PathProgramCache]: Analyzing trace with hash -778258280, now seen corresponding path program 35 times [2021-12-17 10:04:42,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:42,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998800588] [2021-12-17 10:04:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:42,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:43,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:43,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998800588] [2021-12-17 10:04:43,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998800588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:43,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790628365] [2021-12-17 10:04:43,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:04:43,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:43,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:43,073 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:43,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-17 10:04:43,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-17 10:04:43,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:43,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:43,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:43,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:43,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790628365] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:43,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:43,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2021-12-17 10:04:43,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130837398] [2021-12-17 10:04:43,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:43,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 10:04:43,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 10:04:43,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 10:04:43,596 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:44,435 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2021-12-17 10:04:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 10:04:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 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 47 [2021-12-17 10:04:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:44,437 INFO L225 Difference]: With dead ends: 408 [2021-12-17 10:04:44,437 INFO L226 Difference]: Without dead ends: 374 [2021-12-17 10:04:44,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1261, Invalid=5879, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 10:04:44,437 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 221 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:44,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 265 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-17 10:04:44,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 67. [2021-12-17 10:04:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-17 10:04:44,472 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-12-17 10:04:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:44,472 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-17 10:04:44,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-17 10:04:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:44,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:44,472 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:44,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-17 10:04:44,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:44,673 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash 719898041, now seen corresponding path program 36 times [2021-12-17 10:04:44,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:44,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238965737] [2021-12-17 10:04:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:44,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:44,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238965737] [2021-12-17 10:04:44,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238965737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231351380] [2021-12-17 10:04:44,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:04:44,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:44,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:44,858 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:44,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-17 10:04:44,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-17 10:04:44,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:44,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:45,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:45,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231351380] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:45,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:45,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2021-12-17 10:04:45,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107347658] [2021-12-17 10:04:45,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:45,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 10:04:45,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 10:04:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 10:04:45,347 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:46,037 INFO L93 Difference]: Finished difference Result 442 states and 463 transitions. [2021-12-17 10:04:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 10:04:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 47 [2021-12-17 10:04:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:46,038 INFO L225 Difference]: With dead ends: 442 [2021-12-17 10:04:46,038 INFO L226 Difference]: Without dead ends: 408 [2021-12-17 10:04:46,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1107, Invalid=5055, Unknown=0, NotChecked=0, Total=6162 [2021-12-17 10:04:46,038 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 277 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:46,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 236 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-17 10:04:46,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 67. [2021-12-17 10:04:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-17 10:04:46,073 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-12-17 10:04:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:46,073 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-17 10:04:46,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-17 10:04:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 10:04:46,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:46,073 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:46,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-17 10:04:46,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:46,275 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash 491131000, now seen corresponding path program 9 times [2021-12-17 10:04:46,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:46,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887089812] [2021-12-17 10:04:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:46,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:46,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:46,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887089812] [2021-12-17 10:04:46,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887089812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:46,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796675577] [2021-12-17 10:04:46,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:04:46,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:46,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:46,442 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:46,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-17 10:04:46,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 10:04:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:46,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 10:04:46,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:46,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:46,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796675577] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:46,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:46,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2021-12-17 10:04:46,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893880381] [2021-12-17 10:04:46,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:46,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 10:04:46,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 10:04:46,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 10:04:46,915 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:47,575 INFO L93 Difference]: Finished difference Result 478 states and 501 transitions. [2021-12-17 10:04:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 10:04:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 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 47 [2021-12-17 10:04:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:47,576 INFO L225 Difference]: With dead ends: 478 [2021-12-17 10:04:47,576 INFO L226 Difference]: Without dead ends: 444 [2021-12-17 10:04:47,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=941, Invalid=4029, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 10:04:47,577 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 394 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:47,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 211 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-17 10:04:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 69. [2021-12-17 10:04:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2021-12-17 10:04:47,617 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2021-12-17 10:04:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:47,618 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2021-12-17 10:04:47,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2021-12-17 10:04:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 10:04:47,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:47,618 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:47,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-17 10:04:47,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-17 10:04:47,831 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1809280333, now seen corresponding path program 18 times [2021-12-17 10:04:47,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:47,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166804955] [2021-12-17 10:04:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:47,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:47,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:47,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166804955] [2021-12-17 10:04:47,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166804955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:47,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508207342] [2021-12-17 10:04:47,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:04:47,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:47,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:47,923 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:47,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-17 10:04:47,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-17 10:04:47,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:47,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 10:04:47,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:48,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:48,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508207342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:48,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:48,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2021-12-17 10:04:48,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604676711] [2021-12-17 10:04:48,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:48,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 10:04:48,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 10:04:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-17 10:04:48,111 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:48,305 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2021-12-17 10:04:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 10:04:48,305 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 48 [2021-12-17 10:04:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:48,305 INFO L225 Difference]: With dead ends: 80 [2021-12-17 10:04:48,305 INFO L226 Difference]: Without dead ends: 78 [2021-12-17 10:04:48,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-12-17 10:04:48,306 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 62 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:48,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 182 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-17 10:04:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-12-17 10:04:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-12-17 10:04:48,343 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 48 [2021-12-17 10:04:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:48,343 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-12-17 10:04:48,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-12-17 10:04:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:04:48,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:48,344 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:48,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-17 10:04:48,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:48,547 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1574007517, now seen corresponding path program 19 times [2021-12-17 10:04:48,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:48,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759024993] [2021-12-17 10:04:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:48,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:48,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759024993] [2021-12-17 10:04:48,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759024993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484516787] [2021-12-17 10:04:48,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:04:48,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:48,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:48,779 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:48,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-17 10:04:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:04:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:49,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:49,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484516787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:49,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:49,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-12-17 10:04:49,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773355365] [2021-12-17 10:04:49,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:49,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 10:04:49,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:49,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 10:04:49,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:04:49,464 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:49,882 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-12-17 10:04:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 10:04:49,882 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 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 51 [2021-12-17 10:04:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:49,883 INFO L225 Difference]: With dead ends: 155 [2021-12-17 10:04:49,883 INFO L226 Difference]: Without dead ends: 118 [2021-12-17 10:04:49,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1107, Invalid=4745, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 10:04:49,883 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:49,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 188 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-17 10:04:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2021-12-17 10:04:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:04:49,925 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:04:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:49,925 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:04:49,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:04:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:04:49,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:49,926 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:49,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-17 10:04:50,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-17 10:04:50,127 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2142136548, now seen corresponding path program 37 times [2021-12-17 10:04:50,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611464156] [2021-12-17 10:04:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:50,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:50,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:50,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611464156] [2021-12-17 10:04:50,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611464156] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:50,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795973754] [2021-12-17 10:04:50,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:04:50,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:50,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:50,327 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:50,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-17 10:04:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:50,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:04:50,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:50,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:50,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795973754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:50,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:50,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2021-12-17 10:04:50,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936204490] [2021-12-17 10:04:50,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:50,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 10:04:50,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 10:04:50,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 10:04:50,957 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:51,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:51,543 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2021-12-17 10:04:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 10:04:51,543 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 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 51 [2021-12-17 10:04:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:51,543 INFO L225 Difference]: With dead ends: 200 [2021-12-17 10:04:51,543 INFO L226 Difference]: Without dead ends: 163 [2021-12-17 10:04:51,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1310, Invalid=6000, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 10:04:51,544 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:51,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 215 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-17 10:04:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 73. [2021-12-17 10:04:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:04:51,593 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:04:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:51,593 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:04:51,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:04:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:04:51,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:51,593 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:51,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-17 10:04:51,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-17 10:04:51,794 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:51,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2032955133, now seen corresponding path program 38 times [2021-12-17 10:04:51,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:51,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380966124] [2021-12-17 10:04:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:51,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:51,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:51,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380966124] [2021-12-17 10:04:51,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380966124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:51,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206832647] [2021-12-17 10:04:51,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:04:51,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:51,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:51,986 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:51,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-17 10:04:52,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:04:52,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:52,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:04:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:52,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:52,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206832647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:52,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:52,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2021-12-17 10:04:52,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536309444] [2021-12-17 10:04:52,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:52,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 10:04:52,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:52,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 10:04:52,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 10:04:52,632 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:53,366 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2021-12-17 10:04:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 10:04:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 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 51 [2021-12-17 10:04:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:53,367 INFO L225 Difference]: With dead ends: 244 [2021-12-17 10:04:53,367 INFO L226 Difference]: Without dead ends: 207 [2021-12-17 10:04:53,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2817 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1505, Invalid=7051, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 10:04:53,368 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:53,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 280 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:53,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-17 10:04:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2021-12-17 10:04:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:04:53,424 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:04:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:53,424 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:04:53,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:04:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:04:53,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:53,424 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:53,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:53,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-17 10:04:53,625 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:53,625 INFO L85 PathProgramCache]: Analyzing trace with hash 227972860, now seen corresponding path program 39 times [2021-12-17 10:04:53,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:53,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264873069] [2021-12-17 10:04:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:53,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:53,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:53,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264873069] [2021-12-17 10:04:53,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264873069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:53,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654217252] [2021-12-17 10:04:53,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:04:53,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:53,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:53,821 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:53,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-17 10:04:53,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-17 10:04:53,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:53,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:04:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:54,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:54,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654217252] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:54,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:54,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2021-12-17 10:04:54,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129782575] [2021-12-17 10:04:54,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:54,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 10:04:54,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 10:04:54,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 10:04:54,456 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:55,327 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2021-12-17 10:04:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-17 10:04:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 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 51 [2021-12-17 10:04:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:55,328 INFO L225 Difference]: With dead ends: 287 [2021-12-17 10:04:55,328 INFO L226 Difference]: Without dead ends: 250 [2021-12-17 10:04:55,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3166 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1659, Invalid=7847, Unknown=0, NotChecked=0, Total=9506 [2021-12-17 10:04:55,329 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:55,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 258 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:04:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-17 10:04:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 73. [2021-12-17 10:04:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:04:55,386 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:04:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:55,386 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:04:55,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:04:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:04:55,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:55,387 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:55,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:55,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-17 10:04:55,587 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash -245894371, now seen corresponding path program 40 times [2021-12-17 10:04:55,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414516838] [2021-12-17 10:04:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:55,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:55,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:55,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414516838] [2021-12-17 10:04:55,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414516838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:55,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992700522] [2021-12-17 10:04:55,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:04:55,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:55,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:55,791 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:55,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-17 10:04:55,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:04:55,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:55,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:04:55,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:56,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:56,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992700522] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:56,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:56,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2021-12-17 10:04:56,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43802887] [2021-12-17 10:04:56,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:56,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 10:04:56,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 10:04:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 10:04:56,419 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:57,421 INFO L93 Difference]: Finished difference Result 329 states and 347 transitions. [2021-12-17 10:04:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 10:04:57,422 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 51 [2021-12-17 10:04:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:57,422 INFO L225 Difference]: With dead ends: 329 [2021-12-17 10:04:57,422 INFO L226 Difference]: Without dead ends: 292 [2021-12-17 10:04:57,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3391 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1757, Invalid=8343, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 10:04:57,423 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:57,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 302 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:04:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-17 10:04:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 73. [2021-12-17 10:04:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:04:57,475 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:04:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:57,475 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:04:57,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:04:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:04:57,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:57,476 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:57,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-17 10:04:57,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:57,685 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:57,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1646653732, now seen corresponding path program 41 times [2021-12-17 10:04:57,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:57,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324562343] [2021-12-17 10:04:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:57,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 127 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:57,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:57,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324562343] [2021-12-17 10:04:57,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324562343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:57,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935459444] [2021-12-17 10:04:57,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:04:57,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:57,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:57,887 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:57,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-17 10:04:57,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-17 10:04:57,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:04:57,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:04:57,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:04:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:58,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:04:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:58,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935459444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:04:58,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:04:58,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2021-12-17 10:04:58,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410552671] [2021-12-17 10:04:58,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:04:58,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-17 10:04:58,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:04:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-17 10:04:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 10:04:58,494 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:04:59,537 INFO L93 Difference]: Finished difference Result 370 states and 389 transitions. [2021-12-17 10:04:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 10:04:59,538 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-17 10:04:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:04:59,538 INFO L225 Difference]: With dead ends: 370 [2021-12-17 10:04:59,538 INFO L226 Difference]: Without dead ends: 333 [2021-12-17 10:04:59,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3472 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1790, Invalid=8512, Unknown=0, NotChecked=0, Total=10302 [2021-12-17 10:04:59,539 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 197 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:04:59,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 270 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:04:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-17 10:04:59,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 73. [2021-12-17 10:04:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:04:59,590 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:04:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:04:59,590 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:04:59,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:04:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:04:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:04:59,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:04:59,590 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:04:59,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-12-17 10:04:59,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:59,791 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:04:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:04:59,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1356201789, now seen corresponding path program 42 times [2021-12-17 10:04:59,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:04:59,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671515557] [2021-12-17 10:04:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:04:59,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:04:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:04:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:04:59,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:04:59,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671515557] [2021-12-17 10:04:59,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671515557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:04:59,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643372576] [2021-12-17 10:04:59,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:04:59,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:04:59,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:04:59,981 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:04:59,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-17 10:05:00,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-17 10:05:00,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:00,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:05:00,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:00,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:00,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643372576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:00,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:00,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2021-12-17 10:05:00,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330046750] [2021-12-17 10:05:00,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:00,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 10:05:00,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 10:05:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 10:05:00,541 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:01,622 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2021-12-17 10:05:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-17 10:05:01,622 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 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 51 [2021-12-17 10:05:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:01,623 INFO L225 Difference]: With dead ends: 410 [2021-12-17 10:05:01,623 INFO L226 Difference]: Without dead ends: 373 [2021-12-17 10:05:01,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1755, Invalid=8345, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 10:05:01,624 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 198 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:01,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 238 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-17 10:05:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 73. [2021-12-17 10:05:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:05:01,676 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:05:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:01,676 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:05:01,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:05:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:05:01,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:01,677 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:01,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-17 10:05:01,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:01,877 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:01,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:01,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1314520764, now seen corresponding path program 43 times [2021-12-17 10:05:01,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:01,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904899762] [2021-12-17 10:05:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:01,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:02,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:02,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904899762] [2021-12-17 10:05:02,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904899762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:02,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684466192] [2021-12-17 10:05:02,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:05:02,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:02,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:02,091 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:02,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-17 10:05:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:05:02,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:02,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:02,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684466192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:02,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:02,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2021-12-17 10:05:02,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616799096] [2021-12-17 10:05:02,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:02,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 10:05:02,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 10:05:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 10:05:02,663 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:03,716 INFO L93 Difference]: Finished difference Result 449 states and 470 transitions. [2021-12-17 10:05:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 10:05:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 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 51 [2021-12-17 10:05:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:03,717 INFO L225 Difference]: With dead ends: 449 [2021-12-17 10:05:03,717 INFO L226 Difference]: Without dead ends: 412 [2021-12-17 10:05:03,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1655, Invalid=7851, Unknown=0, NotChecked=0, Total=9506 [2021-12-17 10:05:03,718 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 300 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:03,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 281 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-12-17 10:05:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 73. [2021-12-17 10:05:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:05:03,785 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:05:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:03,785 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:05:03,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:05:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:05:03,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:03,786 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:03,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-12-17 10:05:03,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-17 10:05:03,987 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash -626486435, now seen corresponding path program 44 times [2021-12-17 10:05:03,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:03,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074849204] [2021-12-17 10:05:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:03,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:04,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074849204] [2021-12-17 10:05:04,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074849204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468808659] [2021-12-17 10:05:04,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:05:04,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:04,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:04,177 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:04,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-17 10:05:04,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:05:04,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:04,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:05:04,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:04,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:04,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468808659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:04,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:04,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2021-12-17 10:05:04,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825489631] [2021-12-17 10:05:04,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:04,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 10:05:04,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 10:05:04,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 10:05:04,713 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:05,717 INFO L93 Difference]: Finished difference Result 487 states and 509 transitions. [2021-12-17 10:05:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 10:05:05,717 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 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 51 [2021-12-17 10:05:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:05,718 INFO L225 Difference]: With dead ends: 487 [2021-12-17 10:05:05,718 INFO L226 Difference]: Without dead ends: 450 [2021-12-17 10:05:05,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1499, Invalid=7057, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 10:05:05,719 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 311 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:05,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 323 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-17 10:05:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 73. [2021-12-17 10:05:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:05:05,773 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:05:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:05,774 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:05:05,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:05:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:05:05,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:05,774 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:05,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-12-17 10:05:05,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:05,975 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1943299740, now seen corresponding path program 45 times [2021-12-17 10:05:05,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:05,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362655792] [2021-12-17 10:05:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:05,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:06,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:06,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362655792] [2021-12-17 10:05:06,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362655792] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:06,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422272480] [2021-12-17 10:05:06,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:05:06,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:06,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:06,165 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:06,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-17 10:05:06,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-17 10:05:06,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:05:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:06,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:06,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422272480] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:06,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:06,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2021-12-17 10:05:06,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207567904] [2021-12-17 10:05:06,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:06,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 10:05:06,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 10:05:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 10:05:06,710 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:07,654 INFO L93 Difference]: Finished difference Result 524 states and 547 transitions. [2021-12-17 10:05:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-17 10:05:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 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 51 [2021-12-17 10:05:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:07,656 INFO L225 Difference]: With dead ends: 524 [2021-12-17 10:05:07,656 INFO L226 Difference]: Without dead ends: 487 [2021-12-17 10:05:07,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1302, Invalid=6008, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 10:05:07,656 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 374 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:07,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 287 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-12-17 10:05:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2021-12-17 10:05:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-17 10:05:07,713 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-12-17 10:05:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:07,713 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-17 10:05:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-17 10:05:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 10:05:07,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:07,714 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:07,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-17 10:05:07,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:07,914 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1437487235, now seen corresponding path program 10 times [2021-12-17 10:05:07,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:07,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699769614] [2021-12-17 10:05:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:07,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:08,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:08,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699769614] [2021-12-17 10:05:08,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699769614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:08,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332134058] [2021-12-17 10:05:08,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:05:08,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:08,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:08,106 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:08,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-17 10:05:08,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:05:08,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:08,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 10:05:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:08,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:08,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332134058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:08,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:08,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2021-12-17 10:05:08,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231813788] [2021-12-17 10:05:08,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:08,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 10:05:08,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 10:05:08,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 10:05:08,647 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:09,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:09,565 INFO L93 Difference]: Finished difference Result 563 states and 588 transitions. [2021-12-17 10:05:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 10:05:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-17 10:05:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:09,566 INFO L225 Difference]: With dead ends: 563 [2021-12-17 10:05:09,566 INFO L226 Difference]: Without dead ends: 526 [2021-12-17 10:05:09,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1097, Invalid=4755, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 10:05:09,567 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 326 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:09,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 266 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-17 10:05:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 75. [2021-12-17 10:05:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-12-17 10:05:09,624 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 51 [2021-12-17 10:05:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:09,624 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-12-17 10:05:09,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-12-17 10:05:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 10:05:09,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:09,624 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:09,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-12-17 10:05:09,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-17 10:05:09,825 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash -723168425, now seen corresponding path program 20 times [2021-12-17 10:05:09,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:09,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441353979] [2021-12-17 10:05:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:09,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:09,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:09,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441353979] [2021-12-17 10:05:09,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441353979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:09,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600195907] [2021-12-17 10:05:09,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:05:09,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:09,908 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:09,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-17 10:05:09,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:05:09,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 10:05:09,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:10,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:10,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600195907] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:10,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:10,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2021-12-17 10:05:10,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782031208] [2021-12-17 10:05:10,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:10,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 10:05:10,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 10:05:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-12-17 10:05:10,123 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:10,350 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-12-17 10:05:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 10:05:10,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 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 52 [2021-12-17 10:05:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:10,351 INFO L225 Difference]: With dead ends: 86 [2021-12-17 10:05:10,351 INFO L226 Difference]: Without dead ends: 84 [2021-12-17 10:05:10,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-12-17 10:05:10,352 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 66 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:10,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 168 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-17 10:05:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-12-17 10:05:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-12-17 10:05:10,422 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 52 [2021-12-17 10:05:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:10,422 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-12-17 10:05:10,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-12-17 10:05:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:10,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:10,423 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:10,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-17 10:05:10,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-17 10:05:10,623 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash -349749319, now seen corresponding path program 21 times [2021-12-17 10:05:10,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:10,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133427769] [2021-12-17 10:05:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:10,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:10,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:10,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133427769] [2021-12-17 10:05:10,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133427769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:10,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988730250] [2021-12-17 10:05:10,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:05:10,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:10,851 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:10,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-17 10:05:10,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-17 10:05:10,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:10,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:11,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:11,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988730250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:11,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:11,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2021-12-17 10:05:11,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545663768] [2021-12-17 10:05:11,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:11,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-17 10:05:11,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:11,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-17 10:05:11,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 10:05:11,589 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:12,087 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-12-17 10:05:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 10:05:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:12,088 INFO L225 Difference]: With dead ends: 168 [2021-12-17 10:05:12,088 INFO L226 Difference]: Without dead ends: 128 [2021-12-17 10:05:12,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1276, Invalid=5530, Unknown=0, NotChecked=0, Total=6806 [2021-12-17 10:05:12,088 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:12,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 218 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-17 10:05:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2021-12-17 10:05:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:12,152 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:12,152 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:12,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:12,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:12,152 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:12,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-12-17 10:05:12,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:12,353 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:12,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash -865260424, now seen corresponding path program 46 times [2021-12-17 10:05:12,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:12,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783030854] [2021-12-17 10:05:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:12,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:12,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783030854] [2021-12-17 10:05:12,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783030854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875873796] [2021-12-17 10:05:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:05:12,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:12,577 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:12,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-17 10:05:12,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:05:12,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:13,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:13,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875873796] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:13,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:13,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2021-12-17 10:05:13,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785719101] [2021-12-17 10:05:13,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:13,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-17 10:05:13,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-17 10:05:13,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2021-12-17 10:05:13,289 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:14,043 INFO L93 Difference]: Finished difference Result 217 states and 233 transitions. [2021-12-17 10:05:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 10:05:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:14,043 INFO L225 Difference]: With dead ends: 217 [2021-12-17 10:05:14,043 INFO L226 Difference]: Without dead ends: 177 [2021-12-17 10:05:14,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1522, Invalid=7034, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 10:05:14,044 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 69 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:14,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 227 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-17 10:05:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 79. [2021-12-17 10:05:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:14,111 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:14,111 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:14,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:14,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:14,112 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:14,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-12-17 10:05:14,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:14,312 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1436079143, now seen corresponding path program 47 times [2021-12-17 10:05:14,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:14,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372922259] [2021-12-17 10:05:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:14,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:14,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:14,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372922259] [2021-12-17 10:05:14,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372922259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:14,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725316642] [2021-12-17 10:05:14,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:05:14,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:14,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:14,530 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:14,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-17 10:05:14,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-17 10:05:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:15,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:15,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725316642] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:15,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:15,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2021-12-17 10:05:15,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411798675] [2021-12-17 10:05:15,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:15,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-17 10:05:15,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-17 10:05:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 10:05:15,246 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:16,148 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2021-12-17 10:05:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 10:05:16,148 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:16,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:16,149 INFO L225 Difference]: With dead ends: 265 [2021-12-17 10:05:16,149 INFO L226 Difference]: Without dead ends: 225 [2021-12-17 10:05:16,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3369 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1765, Invalid=8335, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 10:05:16,150 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:16,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 304 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-17 10:05:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 79. [2021-12-17 10:05:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:16,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:16,218 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:16,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:16,218 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:16,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:16,218 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:16,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:16,218 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:16,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-12-17 10:05:16,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-17 10:05:16,419 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 762264664, now seen corresponding path program 48 times [2021-12-17 10:05:16,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:16,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543794169] [2021-12-17 10:05:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:16,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:16,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:16,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543794169] [2021-12-17 10:05:16,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543794169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:16,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579243192] [2021-12-17 10:05:16,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:05:16,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:16,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:16,637 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:16,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-17 10:05:16,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-17 10:05:16,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:16,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:16,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:17,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:17,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579243192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:17,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:17,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2021-12-17 10:05:17,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364366139] [2021-12-17 10:05:17,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:17,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 10:05:17,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:17,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 10:05:17,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 10:05:17,386 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:18,452 INFO L93 Difference]: Finished difference Result 312 states and 330 transitions. [2021-12-17 10:05:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 10:05:18,452 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:18,453 INFO L225 Difference]: With dead ends: 312 [2021-12-17 10:05:18,453 INFO L226 Difference]: Without dead ends: 272 [2021-12-17 10:05:18,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3831 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1968, Invalid=9374, Unknown=0, NotChecked=0, Total=11342 [2021-12-17 10:05:18,454 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:18,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 286 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-17 10:05:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 79. [2021-12-17 10:05:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:18,530 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:18,530 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:18,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:18,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:18,530 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:18,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-12-17 10:05:18,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:18,731 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1525915641, now seen corresponding path program 49 times [2021-12-17 10:05:18,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:18,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294285822] [2021-12-17 10:05:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:18,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:18,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294285822] [2021-12-17 10:05:18,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294285822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515808970] [2021-12-17 10:05:18,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:05:18,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:18,969 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:18,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-17 10:05:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:19,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:19,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:19,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:19,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515808970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:19,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:19,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2021-12-17 10:05:19,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858593927] [2021-12-17 10:05:19,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:19,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 10:05:19,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 10:05:19,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:05:19,631 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:20,819 INFO L93 Difference]: Finished difference Result 358 states and 377 transitions. [2021-12-17 10:05:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-17 10:05:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:20,820 INFO L225 Difference]: With dead ends: 358 [2021-12-17 10:05:20,820 INFO L226 Difference]: Without dead ends: 318 [2021-12-17 10:05:20,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2113, Invalid=10097, Unknown=0, NotChecked=0, Total=12210 [2021-12-17 10:05:20,821 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 185 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:20,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 331 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-12-17 10:05:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 79. [2021-12-17 10:05:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:20,900 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:20,900 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:20,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:20,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:20,900 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:20,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-17 10:05:21,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:21,101 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2104738872, now seen corresponding path program 50 times [2021-12-17 10:05:21,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:21,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116483131] [2021-12-17 10:05:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:21,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:21,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:21,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116483131] [2021-12-17 10:05:21,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116483131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603824044] [2021-12-17 10:05:21,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:05:21,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:21,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:21,327 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:21,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-17 10:05:21,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:05:21,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:21,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:21,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:21,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:21,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603824044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:21,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:21,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2021-12-17 10:05:21,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392248569] [2021-12-17 10:05:21,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:21,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 10:05:21,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:21,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 10:05:21,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 10:05:21,990 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:23,223 INFO L93 Difference]: Finished difference Result 403 states and 423 transitions. [2021-12-17 10:05:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-17 10:05:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:23,224 INFO L225 Difference]: With dead ends: 403 [2021-12-17 10:05:23,224 INFO L226 Difference]: Without dead ends: 363 [2021-12-17 10:05:23,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2188, Invalid=10468, Unknown=0, NotChecked=0, Total=12656 [2021-12-17 10:05:23,225 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 172 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:23,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 300 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-17 10:05:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 79. [2021-12-17 10:05:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:23,309 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:23,309 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:23,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:23,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:23,310 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:23,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-12-17 10:05:23,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-12-17 10:05:23,523 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:23,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1984863257, now seen corresponding path program 51 times [2021-12-17 10:05:23,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:23,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541582941] [2021-12-17 10:05:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:23,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:23,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:23,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541582941] [2021-12-17 10:05:23,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541582941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:23,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419548340] [2021-12-17 10:05:23,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:05:23,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:23,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:23,732 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:23,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-17 10:05:23,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-17 10:05:23,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:23,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:23,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:24,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:24,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419548340] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:24,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:24,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2021-12-17 10:05:24,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995531462] [2021-12-17 10:05:24,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:24,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 10:05:24,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 10:05:24,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 10:05:24,379 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:25,766 INFO L93 Difference]: Finished difference Result 447 states and 468 transitions. [2021-12-17 10:05:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 10:05:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-17 10:05:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:25,767 INFO L225 Difference]: With dead ends: 447 [2021-12-17 10:05:25,767 INFO L226 Difference]: Without dead ends: 407 [2021-12-17 10:05:25,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4351 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2187, Invalid=10469, Unknown=0, NotChecked=0, Total=12656 [2021-12-17 10:05:25,768 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 211 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:25,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 324 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-17 10:05:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 79. [2021-12-17 10:05:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:25,844 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:25,844 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:25,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:25,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:25,845 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:25,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-12-17 10:05:26,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:26,045 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:26,045 INFO L85 PathProgramCache]: Analyzing trace with hash 179880984, now seen corresponding path program 52 times [2021-12-17 10:05:26,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:26,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481379571] [2021-12-17 10:05:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:26,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:26,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481379571] [2021-12-17 10:05:26,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481379571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278675526] [2021-12-17 10:05:26,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:05:26,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:26,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:26,271 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:26,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-17 10:05:26,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:05:26,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:26,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:26,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:26,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:26,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278675526] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:26,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:26,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2021-12-17 10:05:26,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828793589] [2021-12-17 10:05:26,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:26,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 10:05:26,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 10:05:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 10:05:26,893 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:28,273 INFO L93 Difference]: Finished difference Result 490 states and 512 transitions. [2021-12-17 10:05:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 10:05:28,273 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-17 10:05:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:28,274 INFO L225 Difference]: With dead ends: 490 [2021-12-17 10:05:28,274 INFO L226 Difference]: Without dead ends: 450 [2021-12-17 10:05:28,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2110, Invalid=10100, Unknown=0, NotChecked=0, Total=12210 [2021-12-17 10:05:28,274 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 238 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:28,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 290 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-17 10:05:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 79. [2021-12-17 10:05:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:28,367 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:28,367 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:28,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:28,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:28,368 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:28,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-12-17 10:05:28,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:28,584 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash -293986247, now seen corresponding path program 53 times [2021-12-17 10:05:28,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:28,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165900902] [2021-12-17 10:05:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:28,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:28,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:28,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165900902] [2021-12-17 10:05:28,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165900902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:28,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008333560] [2021-12-17 10:05:28,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:05:28,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:28,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:28,814 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:28,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-17 10:05:28,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-17 10:05:28,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:28,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:29,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:29,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008333560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:29,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:29,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2021-12-17 10:05:29,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512498521] [2021-12-17 10:05:29,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:29,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 10:05:29,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 10:05:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 10:05:29,456 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:30,799 INFO L93 Difference]: Finished difference Result 532 states and 555 transitions. [2021-12-17 10:05:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-17 10:05:30,800 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:30,801 INFO L225 Difference]: With dead ends: 532 [2021-12-17 10:05:30,801 INFO L226 Difference]: Without dead ends: 492 [2021-12-17 10:05:30,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3846 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1963, Invalid=9379, Unknown=0, NotChecked=0, Total=11342 [2021-12-17 10:05:30,801 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 277 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:30,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 290 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-12-17 10:05:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 79. [2021-12-17 10:05:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:30,880 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:30,881 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:30,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:30,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:30,881 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:30,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-12-17 10:05:31,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:31,083 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1694745608, now seen corresponding path program 54 times [2021-12-17 10:05:31,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:31,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231788216] [2021-12-17 10:05:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:31,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:31,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:31,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231788216] [2021-12-17 10:05:31,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231788216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:31,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864607678] [2021-12-17 10:05:31,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:05:31,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:31,303 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:31,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-17 10:05:31,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-17 10:05:31,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:31,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:31,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864607678] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:31,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:31,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2021-12-17 10:05:31,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206823491] [2021-12-17 10:05:31,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:31,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-17 10:05:31,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:31,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-17 10:05:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 10:05:31,908 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:33,244 INFO L93 Difference]: Finished difference Result 573 states and 597 transitions. [2021-12-17 10:05:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-17 10:05:33,245 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:33,246 INFO L225 Difference]: With dead ends: 573 [2021-12-17 10:05:33,246 INFO L226 Difference]: Without dead ends: 533 [2021-12-17 10:05:33,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1758, Invalid=8342, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 10:05:33,246 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 316 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:33,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 330 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-17 10:05:33,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 79. [2021-12-17 10:05:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:33,328 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:33,328 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:33,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:33,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:33,328 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:33,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-12-17 10:05:33,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:33,529 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1308109913, now seen corresponding path program 55 times [2021-12-17 10:05:33,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:33,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093968813] [2021-12-17 10:05:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:33,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:33,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:33,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093968813] [2021-12-17 10:05:33,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093968813] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:33,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852634001] [2021-12-17 10:05:33,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:05:33,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:33,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:33,753 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:33,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-17 10:05:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:33,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:34,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:34,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852634001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:34,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:34,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2021-12-17 10:05:34,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084377155] [2021-12-17 10:05:34,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:34,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 10:05:34,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:34,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 10:05:34,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 10:05:34,361 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:35,741 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2021-12-17 10:05:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 10:05:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:35,743 INFO L225 Difference]: With dead ends: 613 [2021-12-17 10:05:35,743 INFO L226 Difference]: Without dead ends: 573 [2021-12-17 10:05:35,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1513, Invalid=7043, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 10:05:35,743 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 313 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:35,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 310 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-12-17 10:05:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 79. [2021-12-17 10:05:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-12-17 10:05:35,827 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-12-17 10:05:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:35,827 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-12-17 10:05:35,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-12-17 10:05:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 10:05:35,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:35,828 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:35,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-12-17 10:05:36,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:36,043 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1266428888, now seen corresponding path program 11 times [2021-12-17 10:05:36,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:36,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3581172] [2021-12-17 10:05:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:36,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:36,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:36,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3581172] [2021-12-17 10:05:36,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3581172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:36,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679384459] [2021-12-17 10:05:36,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:05:36,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:36,259 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:36,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-17 10:05:36,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-17 10:05:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:36,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:05:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:36,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:36,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679384459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:36,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:36,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2021-12-17 10:05:36,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939619376] [2021-12-17 10:05:36,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:36,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 10:05:36,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:36,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 10:05:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 10:05:36,843 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:38,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:38,049 INFO L93 Difference]: Finished difference Result 655 states and 682 transitions. [2021-12-17 10:05:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 10:05:38,050 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 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 55 [2021-12-17 10:05:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:38,051 INFO L225 Difference]: With dead ends: 655 [2021-12-17 10:05:38,051 INFO L226 Difference]: Without dead ends: 615 [2021-12-17 10:05:38,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1265, Invalid=5541, Unknown=0, NotChecked=0, Total=6806 [2021-12-17 10:05:38,051 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 365 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:38,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 247 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-12-17 10:05:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 81. [2021-12-17 10:05:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2021-12-17 10:05:38,137 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 55 [2021-12-17 10:05:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:38,138 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2021-12-17 10:05:38,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2021-12-17 10:05:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 10:05:38,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:38,138 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:38,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-12-17 10:05:38,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-12-17 10:05:38,347 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:38,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:38,348 INFO L85 PathProgramCache]: Analyzing trace with hash -66956493, now seen corresponding path program 22 times [2021-12-17 10:05:38,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:38,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502767174] [2021-12-17 10:05:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:38,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:38,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:38,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502767174] [2021-12-17 10:05:38,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502767174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:38,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143112802] [2021-12-17 10:05:38,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:05:38,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:38,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:38,441 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:38,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-17 10:05:38,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:05:38,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:38,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-17 10:05:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:38,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:38,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143112802] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:38,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:38,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2021-12-17 10:05:38,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725678157] [2021-12-17 10:05:38,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:38,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 10:05:38,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 10:05:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-12-17 10:05:38,638 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:38,896 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2021-12-17 10:05:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 10:05:38,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-17 10:05:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:38,897 INFO L225 Difference]: With dead ends: 92 [2021-12-17 10:05:38,897 INFO L226 Difference]: Without dead ends: 90 [2021-12-17 10:05:38,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2021-12-17 10:05:38,897 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:38,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 174 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-17 10:05:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-12-17 10:05:38,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2021-12-17 10:05:38,989 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 56 [2021-12-17 10:05:38,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:38,989 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2021-12-17 10:05:38,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2021-12-17 10:05:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:05:38,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:38,990 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:39,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-12-17 10:05:39,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-12-17 10:05:39,190 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1831214499, now seen corresponding path program 23 times [2021-12-17 10:05:39,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:39,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109353451] [2021-12-17 10:05:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:39,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:39,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:39,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109353451] [2021-12-17 10:05:39,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109353451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:39,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841381939] [2021-12-17 10:05:39,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:05:39,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:39,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:39,454 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:39,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-17 10:05:39,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-17 10:05:39,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:39,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:05:39,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:40,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:40,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841381939] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:40,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:40,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2021-12-17 10:05:40,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853524326] [2021-12-17 10:05:40,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:40,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 10:05:40,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 10:05:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 10:05:40,275 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:40,977 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2021-12-17 10:05:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 10:05:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 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 59 [2021-12-17 10:05:40,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:40,978 INFO L225 Difference]: With dead ends: 181 [2021-12-17 10:05:40,978 INFO L226 Difference]: Without dead ends: 138 [2021-12-17 10:05:40,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1457, Invalid=6375, Unknown=0, NotChecked=0, Total=7832 [2021-12-17 10:05:40,979 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:40,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 217 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-17 10:05:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2021-12-17 10:05:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:05:41,086 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:05:41,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:41,086 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:05:41,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:05:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:05:41,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:41,086 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:41,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-12-17 10:05:41,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:41,287 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:41,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:41,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1372411804, now seen corresponding path program 56 times [2021-12-17 10:05:41,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:41,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474466478] [2021-12-17 10:05:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:41,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:41,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:41,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474466478] [2021-12-17 10:05:41,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474466478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:41,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830027396] [2021-12-17 10:05:41,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:05:41,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:41,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:41,562 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:41,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-12-17 10:05:41,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:05:41,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:41,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:05:41,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:42,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:42,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830027396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:42,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:42,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2021-12-17 10:05:42,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052507422] [2021-12-17 10:05:42,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:42,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-17 10:05:42,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:42,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-17 10:05:42,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 10:05:42,375 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:43,227 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2021-12-17 10:05:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 10:05:43,227 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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 59 [2021-12-17 10:05:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:43,227 INFO L225 Difference]: With dead ends: 234 [2021-12-17 10:05:43,227 INFO L226 Difference]: Without dead ends: 191 [2021-12-17 10:05:43,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1750, Invalid=8150, Unknown=0, NotChecked=0, Total=9900 [2021-12-17 10:05:43,228 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:43,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 255 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-17 10:05:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 85. [2021-12-17 10:05:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:05:43,337 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:05:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:43,337 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:05:43,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:05:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:05:43,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:43,338 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:43,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-12-17 10:05:43,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:43,544 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1710834051, now seen corresponding path program 57 times [2021-12-17 10:05:43,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:43,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449083645] [2021-12-17 10:05:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:43,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:43,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:43,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449083645] [2021-12-17 10:05:43,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449083645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:43,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981115230] [2021-12-17 10:05:43,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:05:43,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:43,794 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:43,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-12-17 10:05:43,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-17 10:05:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:05:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:44,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:44,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981115230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:44,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:44,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2021-12-17 10:05:44,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355701615] [2021-12-17 10:05:44,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:44,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-17 10:05:44,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:44,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-17 10:05:44,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 10:05:44,606 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:45,733 INFO L93 Difference]: Finished difference Result 286 states and 304 transitions. [2021-12-17 10:05:45,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 10:05:45,733 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-17 10:05:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:45,733 INFO L225 Difference]: With dead ends: 286 [2021-12-17 10:05:45,733 INFO L226 Difference]: Without dead ends: 243 [2021-12-17 10:05:45,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3970 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2046, Invalid=9726, Unknown=0, NotChecked=0, Total=11772 [2021-12-17 10:05:45,734 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 102 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:45,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 238 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:45,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-17 10:05:45,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 85. [2021-12-17 10:05:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:05:45,833 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:05:45,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:45,833 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:05:45,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:05:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:05:45,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:45,834 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:45,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-12-17 10:05:46,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:46,034 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1099200380, now seen corresponding path program 58 times [2021-12-17 10:05:46,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:46,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669782159] [2021-12-17 10:05:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:46,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:46,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:46,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669782159] [2021-12-17 10:05:46,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669782159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:46,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994324371] [2021-12-17 10:05:46,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:05:46,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:46,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:46,273 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:46,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-12-17 10:05:46,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:05:46,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:05:46,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:46,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:47,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994324371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:47,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:47,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2021-12-17 10:05:47,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552608908] [2021-12-17 10:05:47,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:47,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-17 10:05:47,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:47,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-17 10:05:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 10:05:47,061 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:48,327 INFO L93 Difference]: Finished difference Result 337 states and 356 transitions. [2021-12-17 10:05:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-17 10:05:48,327 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-17 10:05:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:48,328 INFO L225 Difference]: With dead ends: 337 [2021-12-17 10:05:48,328 INFO L226 Difference]: Without dead ends: 294 [2021-12-17 10:05:48,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2304, Invalid=11036, Unknown=0, NotChecked=0, Total=13340 [2021-12-17 10:05:48,329 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:48,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 236 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:05:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-17 10:05:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 85. [2021-12-17 10:05:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:05:48,441 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:05:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:48,441 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:05:48,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:05:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:05:48,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:48,441 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:48,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-12-17 10:05:48,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:48,648 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1996741987, now seen corresponding path program 59 times [2021-12-17 10:05:48,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:48,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15835969] [2021-12-17 10:05:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:48,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:48,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15835969] [2021-12-17 10:05:48,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15835969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552451734] [2021-12-17 10:05:48,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:05:48,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:48,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:48,884 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:48,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-12-17 10:05:48,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-17 10:05:48,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:05:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:49,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:49,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552451734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:49,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:49,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2021-12-17 10:05:49,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306241983] [2021-12-17 10:05:49,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:49,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-17 10:05:49,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-17 10:05:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 10:05:49,645 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:51,091 INFO L93 Difference]: Finished difference Result 387 states and 407 transitions. [2021-12-17 10:05:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 10:05:51,091 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-17 10:05:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:51,092 INFO L225 Difference]: With dead ends: 387 [2021-12-17 10:05:51,092 INFO L226 Difference]: Without dead ends: 344 [2021-12-17 10:05:51,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5016 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2503, Invalid=12017, Unknown=0, NotChecked=0, Total=14520 [2021-12-17 10:05:51,093 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 214 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:51,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 262 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-17 10:05:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 85. [2021-12-17 10:05:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:05:51,203 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:05:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:51,203 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:05:51,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:05:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:05:51,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:51,204 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:51,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-12-17 10:05:51,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:51,416 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:51,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1782714204, now seen corresponding path program 60 times [2021-12-17 10:05:51,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:51,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375472883] [2021-12-17 10:05:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:51,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:51,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:51,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375472883] [2021-12-17 10:05:51,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375472883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:51,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677734409] [2021-12-17 10:05:51,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:05:51,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:51,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:51,655 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:51,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-12-17 10:05:51,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-17 10:05:51,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:05:51,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:52,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:52,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677734409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:52,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:52,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2021-12-17 10:05:52,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629172823] [2021-12-17 10:05:52,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:52,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-17 10:05:52,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:52,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-17 10:05:52,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2021-12-17 10:05:52,381 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:53,961 INFO L93 Difference]: Finished difference Result 436 states and 457 transitions. [2021-12-17 10:05:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 10:05:53,961 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 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 59 [2021-12-17 10:05:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:53,962 INFO L225 Difference]: With dead ends: 436 [2021-12-17 10:05:53,962 INFO L226 Difference]: Without dead ends: 393 [2021-12-17 10:05:53,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5309 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2628, Invalid=12624, Unknown=0, NotChecked=0, Total=15252 [2021-12-17 10:05:53,963 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 194 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:53,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 329 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-17 10:05:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 85. [2021-12-17 10:05:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:05:54,089 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:05:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:54,089 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:05:54,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:05:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:05:54,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:54,090 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:54,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-12-17 10:05:54,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-12-17 10:05:54,298 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1211895485, now seen corresponding path program 61 times [2021-12-17 10:05:54,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:54,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893281301] [2021-12-17 10:05:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:54,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 188 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:54,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893281301] [2021-12-17 10:05:54,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893281301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006808813] [2021-12-17 10:05:54,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:05:54,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:54,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:54,537 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:54,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-12-17 10:05:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:05:54,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:55,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:55,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006808813] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:55,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:55,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2021-12-17 10:05:55,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38643647] [2021-12-17 10:05:55,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:55,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-17 10:05:55,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:55,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-17 10:05:55,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 10:05:55,237 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:05:56,944 INFO L93 Difference]: Finished difference Result 484 states and 506 transitions. [2021-12-17 10:05:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 10:05:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 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 59 [2021-12-17 10:05:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:05:56,946 INFO L225 Difference]: With dead ends: 484 [2021-12-17 10:05:56,946 INFO L226 Difference]: Without dead ends: 441 [2021-12-17 10:05:56,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2670, Invalid=12830, Unknown=0, NotChecked=0, Total=15500 [2021-12-17 10:05:56,946 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 230 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:05:56,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 262 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:05:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-12-17 10:05:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 85. [2021-12-17 10:05:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:05:57,061 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:05:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:05:57,061 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:05:57,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:05:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:05:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:05:57,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:05:57,061 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:05:57,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-12-17 10:05:57,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:57,262 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:05:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:05:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash -884728004, now seen corresponding path program 62 times [2021-12-17 10:05:57,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:05:57,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292698645] [2021-12-17 10:05:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:05:57,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:05:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:05:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:57,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:05:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292698645] [2021-12-17 10:05:57,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292698645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:05:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573890300] [2021-12-17 10:05:57,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:05:57,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:05:57,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:05:57,495 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:05:57,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-12-17 10:05:57,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:05:57,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:05:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:05:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:05:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:58,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:05:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:05:58,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573890300] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:05:58,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:05:58,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2021-12-17 10:05:58,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820289274] [2021-12-17 10:05:58,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:05:58,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 10:05:58,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:05:58,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 10:05:58,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 10:05:58,172 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:00,028 INFO L93 Difference]: Finished difference Result 531 states and 554 transitions. [2021-12-17 10:06:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-17 10:06:00,028 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 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 59 [2021-12-17 10:06:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:00,029 INFO L225 Difference]: With dead ends: 531 [2021-12-17 10:06:00,029 INFO L226 Difference]: Without dead ends: 488 [2021-12-17 10:06:00,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5334 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2626, Invalid=12626, Unknown=0, NotChecked=0, Total=15252 [2021-12-17 10:06:00,029 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 229 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:00,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 313 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-12-17 10:06:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 85. [2021-12-17 10:06:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:06:00,138 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:06:00,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:00,138 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:06:00,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:06:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:06:00,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:00,139 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:00,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-12-17 10:06:00,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:00,350 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash -121077027, now seen corresponding path program 63 times [2021-12-17 10:06:00,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:00,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48444729] [2021-12-17 10:06:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:00,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:00,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:00,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48444729] [2021-12-17 10:06:00,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48444729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:00,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101214554] [2021-12-17 10:06:00,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:06:00,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:00,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:00,584 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:00,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-12-17 10:06:00,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-17 10:06:00,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:06:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:01,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:01,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101214554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:01,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:01,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2021-12-17 10:06:01,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032696304] [2021-12-17 10:06:01,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:01,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 10:06:01,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:01,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 10:06:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:06:01,291 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:03,087 INFO L93 Difference]: Finished difference Result 577 states and 601 transitions. [2021-12-17 10:06:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 10:06:03,087 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 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 59 [2021-12-17 10:06:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:03,089 INFO L225 Difference]: With dead ends: 577 [2021-12-17 10:06:03,089 INFO L226 Difference]: Without dead ends: 534 [2021-12-17 10:06:03,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2499, Invalid=12021, Unknown=0, NotChecked=0, Total=14520 [2021-12-17 10:06:03,089 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 268 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:03,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 335 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-17 10:06:03,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 85. [2021-12-17 10:06:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:06:03,207 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:06:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:03,207 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:06:03,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:06:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:06:03,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:03,208 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:03,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-12-17 10:06:03,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-12-17 10:06:03,423 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash 457746204, now seen corresponding path program 64 times [2021-12-17 10:06:03,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:03,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48506525] [2021-12-17 10:06:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:03,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:03,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:03,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48506525] [2021-12-17 10:06:03,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48506525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:03,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106116507] [2021-12-17 10:06:03,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:06:03,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:03,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:03,657 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:03,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-12-17 10:06:03,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:06:03,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:06:03,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:04,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:04,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106116507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:04,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:04,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2021-12-17 10:06:04,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796075734] [2021-12-17 10:06:04,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:04,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 10:06:04,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 10:06:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 10:06:04,324 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:06,106 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2021-12-17 10:06:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 10:06:06,107 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 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 59 [2021-12-17 10:06:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:06,108 INFO L225 Difference]: With dead ends: 622 [2021-12-17 10:06:06,108 INFO L226 Difference]: Without dead ends: 579 [2021-12-17 10:06:06,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2298, Invalid=11042, Unknown=0, NotChecked=0, Total=13340 [2021-12-17 10:06:06,109 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 288 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:06,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 320 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-17 10:06:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 85. [2021-12-17 10:06:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:06:06,229 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:06:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:06,229 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:06:06,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:06:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:06:06,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:06,230 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:06,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-12-17 10:06:06,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:06,430 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:06,430 INFO L85 PathProgramCache]: Analyzing trace with hash 337870589, now seen corresponding path program 65 times [2021-12-17 10:06:06,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:06,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735725334] [2021-12-17 10:06:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:06,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:06,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:06,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735725334] [2021-12-17 10:06:06,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735725334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:06,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672749841] [2021-12-17 10:06:06,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:06:06,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:06,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:06,678 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:06,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-12-17 10:06:06,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-17 10:06:06,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:06,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:06:06,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:07,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:07,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672749841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:07,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:07,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2021-12-17 10:06:07,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502144232] [2021-12-17 10:06:07,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:07,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 10:06:07,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 10:06:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 10:06:07,366 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:09,263 INFO L93 Difference]: Finished difference Result 666 states and 692 transitions. [2021-12-17 10:06:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 10:06:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 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 59 [2021-12-17 10:06:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:09,264 INFO L225 Difference]: With dead ends: 666 [2021-12-17 10:06:09,264 INFO L226 Difference]: Without dead ends: 623 [2021-12-17 10:06:09,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2038, Invalid=9734, Unknown=0, NotChecked=0, Total=11772 [2021-12-17 10:06:09,265 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 491 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:09,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 297 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-12-17 10:06:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 85. [2021-12-17 10:06:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:06:09,383 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:06:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:09,383 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:06:09,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:06:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:06:09,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:09,383 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:09,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-12-17 10:06:09,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:09,584 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:09,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:09,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1467111684, now seen corresponding path program 66 times [2021-12-17 10:06:09,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:09,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687997703] [2021-12-17 10:06:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:09,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:09,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:09,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687997703] [2021-12-17 10:06:09,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687997703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:09,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152017122] [2021-12-17 10:06:09,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:06:09,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:09,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:09,834 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:09,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-12-17 10:06:09,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-17 10:06:09,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:09,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:06:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:10,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:10,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152017122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:10,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:10,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2021-12-17 10:06:10,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650913716] [2021-12-17 10:06:10,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:10,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 10:06:10,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:10,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 10:06:10,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 10:06:10,521 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:12,506 INFO L93 Difference]: Finished difference Result 709 states and 736 transitions. [2021-12-17 10:06:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-17 10:06:12,506 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 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 59 [2021-12-17 10:06:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:12,507 INFO L225 Difference]: With dead ends: 709 [2021-12-17 10:06:12,507 INFO L226 Difference]: Without dead ends: 666 [2021-12-17 10:06:12,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1740, Invalid=8160, Unknown=0, NotChecked=0, Total=9900 [2021-12-17 10:06:12,508 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 442 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:12,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 307 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-12-17 10:06:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 85. [2021-12-17 10:06:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-12-17 10:06:12,627 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-12-17 10:06:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:12,627 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-12-17 10:06:12,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-12-17 10:06:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 10:06:12,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:12,628 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:12,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-12-17 10:06:12,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-17 10:06:12,839 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:12,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1940978915, now seen corresponding path program 12 times [2021-12-17 10:06:12,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:12,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772907803] [2021-12-17 10:06:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:12,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:13,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:13,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772907803] [2021-12-17 10:06:13,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772907803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:13,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960019634] [2021-12-17 10:06:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:06:13,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:13,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:13,108 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:13,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-12-17 10:06:13,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-17 10:06:13,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 10:06:13,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:13,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:13,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960019634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:13,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:13,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2021-12-17 10:06:13,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876671266] [2021-12-17 10:06:13,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:13,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 10:06:13,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 10:06:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 10:06:13,751 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:15,516 INFO L93 Difference]: Finished difference Result 754 states and 783 transitions. [2021-12-17 10:06:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 10:06:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 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 59 [2021-12-17 10:06:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:15,517 INFO L225 Difference]: With dead ends: 754 [2021-12-17 10:06:15,517 INFO L226 Difference]: Without dead ends: 711 [2021-12-17 10:06:15,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1445, Invalid=6387, Unknown=0, NotChecked=0, Total=7832 [2021-12-17 10:06:15,518 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 561 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:15,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 263 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:06:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-12-17 10:06:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 87. [2021-12-17 10:06:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.186046511627907) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-12-17 10:06:15,641 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 59 [2021-12-17 10:06:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:15,641 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-12-17 10:06:15,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-12-17 10:06:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 10:06:15,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:15,641 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:15,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-12-17 10:06:15,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-17 10:06:15,842 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:15,842 INFO L85 PathProgramCache]: Analyzing trace with hash -794122025, now seen corresponding path program 24 times [2021-12-17 10:06:15,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:15,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087777971] [2021-12-17 10:06:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:15,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:15,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:15,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087777971] [2021-12-17 10:06:15,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087777971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:15,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771106954] [2021-12-17 10:06:15,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:06:15,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:15,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:15,945 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:15,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-12-17 10:06:15,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-17 10:06:15,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:15,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 10:06:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:16,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:16,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771106954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:16,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:16,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2021-12-17 10:06:16,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920778867] [2021-12-17 10:06:16,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:16,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 10:06:16,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 10:06:16,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-12-17 10:06:16,168 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:16,476 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2021-12-17 10:06:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 10:06:16,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-17 10:06:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:16,477 INFO L225 Difference]: With dead ends: 98 [2021-12-17 10:06:16,477 INFO L226 Difference]: Without dead ends: 96 [2021-12-17 10:06:16,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 10:06:16,477 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 94 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:16,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 164 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:06:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-17 10:06:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-12-17 10:06:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2021-12-17 10:06:16,598 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 60 [2021-12-17 10:06:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:16,598 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2021-12-17 10:06:16,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2021-12-17 10:06:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:16,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:16,598 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:16,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-12-17 10:06:16,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-12-17 10:06:16,799 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1004537287, now seen corresponding path program 25 times [2021-12-17 10:06:16,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:16,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201229551] [2021-12-17 10:06:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:16,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:17,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:17,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201229551] [2021-12-17 10:06:17,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201229551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:17,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100640672] [2021-12-17 10:06:17,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:06:17,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:17,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:17,090 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:17,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-12-17 10:06:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:17,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:17,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:17,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100640672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:17,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:17,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2021-12-17 10:06:17,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527207992] [2021-12-17 10:06:17,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:17,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 10:06:17,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 10:06:17,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:06:17,971 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:18,743 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2021-12-17 10:06:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 10:06:18,744 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:18,744 INFO L225 Difference]: With dead ends: 194 [2021-12-17 10:06:18,744 INFO L226 Difference]: Without dead ends: 148 [2021-12-17 10:06:18,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2944 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1650, Invalid=7280, Unknown=0, NotChecked=0, Total=8930 [2021-12-17 10:06:18,745 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:18,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 314 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:06:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-17 10:06:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 91. [2021-12-17 10:06:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:18,879 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:18,879 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:18,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:18,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:18,880 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:18,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-12-17 10:06:19,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:19,080 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1170782200, now seen corresponding path program 67 times [2021-12-17 10:06:19,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:19,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543123770] [2021-12-17 10:06:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:19,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:19,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:19,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543123770] [2021-12-17 10:06:19,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543123770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:19,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585430262] [2021-12-17 10:06:19,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:06:19,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:19,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:19,371 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:19,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-12-17 10:06:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:20,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:20,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585430262] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:20,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:20,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2021-12-17 10:06:20,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883607571] [2021-12-17 10:06:20,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:20,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-17 10:06:20,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-17 10:06:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 10:06:20,358 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:21,507 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2021-12-17 10:06:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 10:06:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:21,507 INFO L225 Difference]: With dead ends: 251 [2021-12-17 10:06:21,507 INFO L226 Difference]: Without dead ends: 205 [2021-12-17 10:06:21,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3792 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1994, Invalid=9348, Unknown=0, NotChecked=0, Total=11342 [2021-12-17 10:06:21,508 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:21,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 293 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-17 10:06:21,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 91. [2021-12-17 10:06:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:21,660 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:21,660 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:21,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:21,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:21,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:21,661 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:21,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-12-17 10:06:21,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-12-17 10:06:21,874 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1933690457, now seen corresponding path program 68 times [2021-12-17 10:06:21,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:21,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703690118] [2021-12-17 10:06:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:21,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:22,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:22,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703690118] [2021-12-17 10:06:22,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703690118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:22,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927071910] [2021-12-17 10:06:22,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:06:22,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:22,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:22,154 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:22,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-12-17 10:06:22,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:06:22,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:22,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:22,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:22,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:23,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927071910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:23,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:23,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2021-12-17 10:06:23,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236943798] [2021-12-17 10:06:23,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:23,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-17 10:06:23,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-17 10:06:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 10:06:23,036 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:24,398 INFO L93 Difference]: Finished difference Result 307 states and 326 transitions. [2021-12-17 10:06:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 10:06:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:24,398 INFO L225 Difference]: With dead ends: 307 [2021-12-17 10:06:24,398 INFO L226 Difference]: Without dead ends: 261 [2021-12-17 10:06:24,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4620 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2348, Invalid=11224, Unknown=0, NotChecked=0, Total=13572 [2021-12-17 10:06:24,399 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 120 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:24,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 236 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-17 10:06:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 91. [2021-12-17 10:06:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:24,550 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:24,550 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:24,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:24,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:24,551 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:24,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-12-17 10:06:24,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-12-17 10:06:24,760 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1127016408, now seen corresponding path program 69 times [2021-12-17 10:06:24,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:24,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646005887] [2021-12-17 10:06:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:24,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:25,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:25,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646005887] [2021-12-17 10:06:25,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646005887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:25,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337600055] [2021-12-17 10:06:25,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:06:25,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:25,034 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:25,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-12-17 10:06:25,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-17 10:06:25,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:25,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:25,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:25,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:25,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337600055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:25,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:25,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2021-12-17 10:06:25,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70113825] [2021-12-17 10:06:25,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:25,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-17 10:06:25,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:25,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-17 10:06:25,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 10:06:25,875 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:27,507 INFO L93 Difference]: Finished difference Result 362 states and 382 transitions. [2021-12-17 10:06:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-17 10:06:27,507 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:27,507 INFO L225 Difference]: With dead ends: 362 [2021-12-17 10:06:27,507 INFO L226 Difference]: Without dead ends: 316 [2021-12-17 10:06:27,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2667, Invalid=12833, Unknown=0, NotChecked=0, Total=15500 [2021-12-17 10:06:27,508 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 126 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:27,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 320 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-17 10:06:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 91. [2021-12-17 10:06:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:27,657 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:27,657 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:27,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:27,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:27,657 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:27,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-12-17 10:06:27,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:27,858 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1655183993, now seen corresponding path program 70 times [2021-12-17 10:06:27,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:27,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871138623] [2021-12-17 10:06:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:27,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:28,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:28,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871138623] [2021-12-17 10:06:28,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871138623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:28,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694904806] [2021-12-17 10:06:28,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:06:28,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:28,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:28,123 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:28,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-12-17 10:06:28,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:06:28,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:28,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:28,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:28,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694904806] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:28,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:28,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2021-12-17 10:06:28,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391143120] [2021-12-17 10:06:28,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:28,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 10:06:28,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:28,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 10:06:28,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 10:06:28,951 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:30,899 INFO L93 Difference]: Finished difference Result 416 states and 437 transitions. [2021-12-17 10:06:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-17 10:06:30,900 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:30,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:30,900 INFO L225 Difference]: With dead ends: 416 [2021-12-17 10:06:30,900 INFO L226 Difference]: Without dead ends: 370 [2021-12-17 10:06:30,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5947 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2927, Invalid=14103, Unknown=0, NotChecked=0, Total=17030 [2021-12-17 10:06:30,901 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:30,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 425 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-12-17 10:06:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 91. [2021-12-17 10:06:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:31,069 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:31,069 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:31,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:31,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:31,069 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:31,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-12-17 10:06:31,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:31,270 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:31,270 INFO L85 PathProgramCache]: Analyzing trace with hash 563843000, now seen corresponding path program 71 times [2021-12-17 10:06:31,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:31,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274065347] [2021-12-17 10:06:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:31,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:31,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:31,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274065347] [2021-12-17 10:06:31,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274065347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:31,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304032511] [2021-12-17 10:06:31,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:06:31,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:31,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:31,553 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:31,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-12-17 10:06:31,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-17 10:06:31,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:31,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:32,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:32,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304032511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:32,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:32,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2021-12-17 10:06:32,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727016676] [2021-12-17 10:06:32,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:32,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-17 10:06:32,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-17 10:06:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 10:06:32,357 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:34,363 INFO L93 Difference]: Finished difference Result 469 states and 491 transitions. [2021-12-17 10:06:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-17 10:06:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:34,363 INFO L225 Difference]: With dead ends: 469 [2021-12-17 10:06:34,363 INFO L226 Difference]: Without dead ends: 423 [2021-12-17 10:06:34,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6373 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3110, Invalid=14980, Unknown=0, NotChecked=0, Total=18090 [2021-12-17 10:06:34,364 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 180 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:34,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 316 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-12-17 10:06:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 91. [2021-12-17 10:06:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:34,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:34,513 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:34,513 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:34,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:34,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:34,514 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:34,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-12-17 10:06:34,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-12-17 10:06:34,729 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:34,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:34,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1775564441, now seen corresponding path program 72 times [2021-12-17 10:06:34,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:34,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681721876] [2021-12-17 10:06:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:34,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:34,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:34,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681721876] [2021-12-17 10:06:34,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681721876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:34,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106375501] [2021-12-17 10:06:34,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:06:34,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:34,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:34,993 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:34,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-12-17 10:06:35,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-17 10:06:35,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:35,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:35,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106375501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:35,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:35,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2021-12-17 10:06:35,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343910252] [2021-12-17 10:06:35,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:35,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-17 10:06:35,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:35,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-17 10:06:35,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 10:06:35,789 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:38,044 INFO L93 Difference]: Finished difference Result 521 states and 544 transitions. [2021-12-17 10:06:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-17 10:06:38,044 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:38,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:38,045 INFO L225 Difference]: With dead ends: 521 [2021-12-17 10:06:38,045 INFO L226 Difference]: Without dead ends: 475 [2021-12-17 10:06:38,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6602 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3204, Invalid=15428, Unknown=0, NotChecked=0, Total=18632 [2021-12-17 10:06:38,046 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 241 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:38,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 277 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-17 10:06:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 91. [2021-12-17 10:06:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:38,210 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:38,210 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:38,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:38,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:38,210 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:38,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-12-17 10:06:38,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:38,411 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 290631576, now seen corresponding path program 73 times [2021-12-17 10:06:38,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:38,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824769923] [2021-12-17 10:06:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:38,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:38,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:38,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824769923] [2021-12-17 10:06:38,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824769923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:38,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840671870] [2021-12-17 10:06:38,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:06:38,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:38,676 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:38,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-12-17 10:06:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:38,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:38,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:39,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:39,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840671870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:39,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:39,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2021-12-17 10:06:39,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289936515] [2021-12-17 10:06:39,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:39,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-17 10:06:39,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:39,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-17 10:06:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 10:06:39,453 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:41,872 INFO L93 Difference]: Finished difference Result 572 states and 596 transitions. [2021-12-17 10:06:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-17 10:06:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:41,874 INFO L225 Difference]: With dead ends: 572 [2021-12-17 10:06:41,874 INFO L226 Difference]: Without dead ends: 526 [2021-12-17 10:06:41,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6620 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3203, Invalid=15429, Unknown=0, NotChecked=0, Total=18632 [2021-12-17 10:06:41,875 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 269 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:41,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 397 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-17 10:06:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 91. [2021-12-17 10:06:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:42,034 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:42,034 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:42,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:42,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:42,035 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:42,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-12-17 10:06:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-12-17 10:06:42,235 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1489656505, now seen corresponding path program 74 times [2021-12-17 10:06:42,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:42,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355836929] [2021-12-17 10:06:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:42,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:42,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:42,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355836929] [2021-12-17 10:06:42,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355836929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:42,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67582981] [2021-12-17 10:06:42,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:06:42,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:42,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:42,509 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:42,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-12-17 10:06:42,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:06:42,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:43,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:43,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67582981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:43,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:43,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2021-12-17 10:06:43,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207360876] [2021-12-17 10:06:43,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:43,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-17 10:06:43,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-17 10:06:43,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 10:06:43,258 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:45,899 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2021-12-17 10:06:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-17 10:06:45,899 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:45,900 INFO L225 Difference]: With dead ends: 622 [2021-12-17 10:06:45,900 INFO L226 Difference]: Without dead ends: 576 [2021-12-17 10:06:45,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6421 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3107, Invalid=14983, Unknown=0, NotChecked=0, Total=18090 [2021-12-17 10:06:45,900 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 293 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:45,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 293 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-12-17 10:06:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 91. [2021-12-17 10:06:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:46,062 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:46,062 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:46,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:46,062 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:46,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:46,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:46,063 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:46,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-12-17 10:06:46,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-12-17 10:06:46,263 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash 974145400, now seen corresponding path program 75 times [2021-12-17 10:06:46,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:46,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314333316] [2021-12-17 10:06:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:46,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:46,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:46,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314333316] [2021-12-17 10:06:46,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314333316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:46,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023041902] [2021-12-17 10:06:46,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:06:46,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:46,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:46,525 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:46,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-12-17 10:06:46,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-17 10:06:46,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:46,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:46,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:47,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:47,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023041902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:47,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:47,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2021-12-17 10:06:47,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001281887] [2021-12-17 10:06:47,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:47,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-17 10:06:47,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-17 10:06:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2021-12-17 10:06:47,304 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:49,764 INFO L93 Difference]: Finished difference Result 671 states and 697 transitions. [2021-12-17 10:06:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-17 10:06:49,764 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 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 63 [2021-12-17 10:06:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:49,765 INFO L225 Difference]: With dead ends: 671 [2021-12-17 10:06:49,765 INFO L226 Difference]: Without dead ends: 625 [2021-12-17 10:06:49,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6007 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2922, Invalid=14108, Unknown=0, NotChecked=0, Total=17030 [2021-12-17 10:06:49,765 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 301 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:49,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 326 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-17 10:06:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 91. [2021-12-17 10:06:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:49,922 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:49,922 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:49,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:49,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:49,922 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:49,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-12-17 10:06:50,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:50,129 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:50,130 INFO L85 PathProgramCache]: Analyzing trace with hash 403326681, now seen corresponding path program 76 times [2021-12-17 10:06:50,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:50,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162353065] [2021-12-17 10:06:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:50,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:50,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:50,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162353065] [2021-12-17 10:06:50,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162353065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:50,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583970164] [2021-12-17 10:06:50,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:06:50,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:50,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:50,398 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:50,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-12-17 10:06:50,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:06:50,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:50,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:51,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:51,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583970164] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:51,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:51,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2021-12-17 10:06:51,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274922390] [2021-12-17 10:06:51,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-17 10:06:51,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-17 10:06:51,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 10:06:51,120 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:53,510 INFO L93 Difference]: Finished difference Result 719 states and 746 transitions. [2021-12-17 10:06:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-17 10:06:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 10:06:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:53,511 INFO L225 Difference]: With dead ends: 719 [2021-12-17 10:06:53,511 INFO L226 Difference]: Without dead ends: 673 [2021-12-17 10:06:53,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5392 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2660, Invalid=12840, Unknown=0, NotChecked=0, Total=15500 [2021-12-17 10:06:53,512 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 349 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:53,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 326 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-12-17 10:06:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 91. [2021-12-17 10:06:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:53,679 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:53,679 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:53,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:53,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:53,680 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:53,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-12-17 10:06:53,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-12-17 10:06:53,880 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1693296808, now seen corresponding path program 77 times [2021-12-17 10:06:53,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:53,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393280875] [2021-12-17 10:06:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:53,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:54,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:54,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393280875] [2021-12-17 10:06:54,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393280875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:54,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703657986] [2021-12-17 10:06:54,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:06:54,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:54,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:54,153 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:54,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-12-17 10:06:54,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-17 10:06:54,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:54,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:54,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:54,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:54,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703657986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:54,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:54,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2021-12-17 10:06:54,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259445493] [2021-12-17 10:06:54,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:54,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 10:06:54,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:54,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 10:06:54,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 10:06:54,885 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:06:57,465 INFO L93 Difference]: Finished difference Result 766 states and 794 transitions. [2021-12-17 10:06:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-17 10:06:57,465 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 10:06:57,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:06:57,467 INFO L225 Difference]: With dead ends: 766 [2021-12-17 10:06:57,467 INFO L226 Difference]: Without dead ends: 720 [2021-12-17 10:06:57,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4602 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2339, Invalid=11233, Unknown=0, NotChecked=0, Total=13572 [2021-12-17 10:06:57,468 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 418 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:06:57,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 318 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:06:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-12-17 10:06:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 91. [2021-12-17 10:06:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:06:57,640 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:06:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:06:57,640 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:06:57,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:06:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:06:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:06:57,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:06:57,641 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:06:57,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-12-17 10:06:57,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-12-17 10:06:57,841 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:06:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:06:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash -929645831, now seen corresponding path program 78 times [2021-12-17 10:06:57,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:06:57,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914292385] [2021-12-17 10:06:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:06:57,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:06:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:06:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:58,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:06:58,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914292385] [2021-12-17 10:06:58,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914292385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:06:58,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540794994] [2021-12-17 10:06:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:06:58,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:06:58,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:06:58,112 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:06:58,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-12-17 10:06:58,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-17 10:06:58,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:06:58,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:06:58,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:06:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:58,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:06:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:06:58,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540794994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:06:58,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:06:58,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2021-12-17 10:06:58,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348301709] [2021-12-17 10:06:58,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:06:58,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 10:06:58,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:06:58,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 10:06:58,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:06:58,821 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:01,304 INFO L93 Difference]: Finished difference Result 812 states and 841 transitions. [2021-12-17 10:07:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-17 10:07:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 10:07:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:01,305 INFO L225 Difference]: With dead ends: 812 [2021-12-17 10:07:01,305 INFO L226 Difference]: Without dead ends: 766 [2021-12-17 10:07:01,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3645 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1983, Invalid=9359, Unknown=0, NotChecked=0, Total=11342 [2021-12-17 10:07:01,306 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 358 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:01,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 399 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:01,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-12-17 10:07:01,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 91. [2021-12-17 10:07:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-17 10:07:01,475 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2021-12-17 10:07:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:01,476 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-17 10:07:01,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-17 10:07:01,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 10:07:01,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:01,476 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:01,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-12-17 10:07:01,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:01,676 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:01,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash -350822600, now seen corresponding path program 13 times [2021-12-17 10:07:01,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:01,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533025669] [2021-12-17 10:07:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:01,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:01,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:01,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533025669] [2021-12-17 10:07:01,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533025669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:01,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022759025] [2021-12-17 10:07:01,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:07:01,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:01,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:01,953 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:01,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-12-17 10:07:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:01,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 10:07:01,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:02,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:02,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022759025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:02,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:02,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2021-12-17 10:07:02,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332250254] [2021-12-17 10:07:02,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:02,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 10:07:02,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 10:07:02,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 10:07:02,627 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:05,132 INFO L93 Difference]: Finished difference Result 860 states and 891 transitions. [2021-12-17 10:07:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 10:07:05,132 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 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 63 [2021-12-17 10:07:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:05,133 INFO L225 Difference]: With dead ends: 860 [2021-12-17 10:07:05,133 INFO L226 Difference]: Without dead ends: 814 [2021-12-17 10:07:05,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2637 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1637, Invalid=7293, Unknown=0, NotChecked=0, Total=8930 [2021-12-17 10:07:05,133 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 432 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:05,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 356 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-17 10:07:05,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 93. [2021-12-17 10:07:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2021-12-17 10:07:05,303 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 63 [2021-12-17 10:07:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:05,303 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2021-12-17 10:07:05,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2021-12-17 10:07:05,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 10:07:05,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:05,303 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:05,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-12-17 10:07:05,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:05,504 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2032864333, now seen corresponding path program 26 times [2021-12-17 10:07:05,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:05,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64267765] [2021-12-17 10:07:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:05,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:05,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:05,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64267765] [2021-12-17 10:07:05,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64267765] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:05,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422032040] [2021-12-17 10:07:05,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:07:05,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:05,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:05,618 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:05,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-12-17 10:07:05,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:07:05,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:05,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 10:07:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:05,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:05,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422032040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:05,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:05,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2021-12-17 10:07:05,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030950466] [2021-12-17 10:07:05,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:05,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 10:07:05,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:05,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 10:07:05,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-12-17 10:07:05,868 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:06,245 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2021-12-17 10:07:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 10:07:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-17 10:07:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:06,245 INFO L225 Difference]: With dead ends: 104 [2021-12-17 10:07:06,245 INFO L226 Difference]: Without dead ends: 102 [2021-12-17 10:07:06,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 10:07:06,246 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 80 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:06,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 236 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:07:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-17 10:07:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-12-17 10:07:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2021-12-17 10:07:06,426 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 64 [2021-12-17 10:07:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:06,426 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2021-12-17 10:07:06,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2021-12-17 10:07:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:06,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:06,427 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:06,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-12-17 10:07:06,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-12-17 10:07:06,631 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2017627683, now seen corresponding path program 27 times [2021-12-17 10:07:06,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:06,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135824193] [2021-12-17 10:07:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:06,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:06,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135824193] [2021-12-17 10:07:06,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135824193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841578830] [2021-12-17 10:07:06,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:07:06,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:06,941 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:06,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-12-17 10:07:06,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-17 10:07:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:06,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:07,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:07,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841578830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:07,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:07,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2021-12-17 10:07:07,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576241399] [2021-12-17 10:07:07,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:07,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-17 10:07:07,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-17 10:07:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 10:07:07,918 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:08,862 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2021-12-17 10:07:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 10:07:08,862 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:08,862 INFO L225 Difference]: With dead ends: 207 [2021-12-17 10:07:08,862 INFO L226 Difference]: Without dead ends: 158 [2021-12-17 10:07:08,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 10:07:08,863 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:08,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 235 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:07:08,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-17 10:07:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2021-12-17 10:07:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:09,100 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:09,100 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:09,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:09,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:09,101 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:09,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-12-17 10:07:09,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-12-17 10:07:09,301 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1732458524, now seen corresponding path program 79 times [2021-12-17 10:07:09,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:09,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175904492] [2021-12-17 10:07:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:09,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:09,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:09,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175904492] [2021-12-17 10:07:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175904492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:09,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248184821] [2021-12-17 10:07:09,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:07:09,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:09,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:09,618 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:09,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-12-17 10:07:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:09,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:09,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:10,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:10,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248184821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:10,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:10,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2021-12-17 10:07:10,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703316712] [2021-12-17 10:07:10,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:10,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-17 10:07:10,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-17 10:07:10,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2021-12-17 10:07:10,554 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:11,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:11,830 INFO L93 Difference]: Finished difference Result 268 states and 287 transitions. [2021-12-17 10:07:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-17 10:07:11,830 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:11,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:11,831 INFO L225 Difference]: With dead ends: 268 [2021-12-17 10:07:11,831 INFO L226 Difference]: Without dead ends: 219 [2021-12-17 10:07:11,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2254, Invalid=10628, Unknown=0, NotChecked=0, Total=12882 [2021-12-17 10:07:11,832 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:11,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 247 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:07:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-17 10:07:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 97. [2021-12-17 10:07:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:12,029 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:12,029 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:12,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:12,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:12,030 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:12,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-12-17 10:07:12,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:12,246 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash -86233603, now seen corresponding path program 80 times [2021-12-17 10:07:12,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981289540] [2021-12-17 10:07:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:12,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:12,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:12,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981289540] [2021-12-17 10:07:12,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981289540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:12,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162519123] [2021-12-17 10:07:12,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:07:12,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:12,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:12,575 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:12,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-12-17 10:07:12,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:07:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:13,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:13,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162519123] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:13,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:13,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2021-12-17 10:07:13,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638389825] [2021-12-17 10:07:13,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:13,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-17 10:07:13,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:13,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-17 10:07:13,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 10:07:13,542 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:15,398 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2021-12-17 10:07:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-17 10:07:15,398 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:15,401 INFO L225 Difference]: With dead ends: 328 [2021-12-17 10:07:15,401 INFO L226 Difference]: Without dead ends: 279 [2021-12-17 10:07:15,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5319 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2671, Invalid=12829, Unknown=0, NotChecked=0, Total=15500 [2021-12-17 10:07:15,402 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 95 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:15,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 293 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-17 10:07:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 97. [2021-12-17 10:07:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:15,606 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:15,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:15,606 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:15,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:15,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:15,607 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:15,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-12-17 10:07:15,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:15,807 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:15,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1253279748, now seen corresponding path program 81 times [2021-12-17 10:07:15,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799150704] [2021-12-17 10:07:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:15,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:16,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:16,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799150704] [2021-12-17 10:07:16,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799150704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:16,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246391772] [2021-12-17 10:07:16,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:07:16,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:16,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:16,114 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:16,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-12-17 10:07:16,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-17 10:07:16,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:16,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:17,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246391772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:17,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:17,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2021-12-17 10:07:17,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109876203] [2021-12-17 10:07:17,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:17,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-17 10:07:17,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-17 10:07:17,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 10:07:17,066 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:19,036 INFO L93 Difference]: Finished difference Result 387 states and 408 transitions. [2021-12-17 10:07:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-17 10:07:19,036 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:19,036 INFO L225 Difference]: With dead ends: 387 [2021-12-17 10:07:19,036 INFO L226 Difference]: Without dead ends: 338 [2021-12-17 10:07:19,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6204 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3057, Invalid=14765, Unknown=0, NotChecked=0, Total=17822 [2021-12-17 10:07:19,037 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 126 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:19,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 293 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-17 10:07:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 97. [2021-12-17 10:07:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:19,247 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:19,247 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:19,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:19,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:19,247 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:19,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-12-17 10:07:19,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:19,463 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1757114909, now seen corresponding path program 82 times [2021-12-17 10:07:19,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:19,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405320105] [2021-12-17 10:07:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:19,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:19,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:19,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405320105] [2021-12-17 10:07:19,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405320105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:19,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018138880] [2021-12-17 10:07:19,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:07:19,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:19,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:19,775 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:19,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-12-17 10:07:19,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:07:19,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:19,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:20,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:20,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018138880] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:20,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:20,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2021-12-17 10:07:20,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329395445] [2021-12-17 10:07:20,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:20,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 10:07:20,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 10:07:20,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:07:20,673 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:23,025 INFO L93 Difference]: Finished difference Result 445 states and 467 transitions. [2021-12-17 10:07:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-17 10:07:23,025 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:23,026 INFO L225 Difference]: With dead ends: 445 [2021-12-17 10:07:23,026 INFO L226 Difference]: Without dead ends: 396 [2021-12-17 10:07:23,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6957 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3385, Invalid=16355, Unknown=0, NotChecked=0, Total=19740 [2021-12-17 10:07:23,027 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 162 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:23,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 335 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:23,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-17 10:07:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 97. [2021-12-17 10:07:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:23,263 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:23,263 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:23,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:23,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:23,264 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:23,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-12-17 10:07:23,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-12-17 10:07:23,464 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash -362532900, now seen corresponding path program 83 times [2021-12-17 10:07:23,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:23,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824106609] [2021-12-17 10:07:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:23,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:23,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:23,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824106609] [2021-12-17 10:07:23,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824106609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:23,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477783106] [2021-12-17 10:07:23,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:07:23,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:23,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:23,761 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:23,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-12-17 10:07:23,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-17 10:07:23,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:24,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:24,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477783106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:24,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:24,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2021-12-17 10:07:24,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921031189] [2021-12-17 10:07:24,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:24,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-17 10:07:24,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-17 10:07:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 10:07:24,651 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:27,221 INFO L93 Difference]: Finished difference Result 502 states and 525 transitions. [2021-12-17 10:07:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-17 10:07:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:27,222 INFO L225 Difference]: With dead ends: 502 [2021-12-17 10:07:27,222 INFO L226 Difference]: Without dead ends: 453 [2021-12-17 10:07:27,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7534 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3634, Invalid=17536, Unknown=0, NotChecked=0, Total=21170 [2021-12-17 10:07:27,223 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 186 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:27,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 356 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-12-17 10:07:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 97. [2021-12-17 10:07:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:27,453 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:27,453 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:27,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:27,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:27,453 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:27,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-12-17 10:07:27,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-12-17 10:07:27,654 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash 400375357, now seen corresponding path program 84 times [2021-12-17 10:07:27,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:27,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342438334] [2021-12-17 10:07:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:27,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:27,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342438334] [2021-12-17 10:07:27,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342438334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326230167] [2021-12-17 10:07:27,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:07:27,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:27,961 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:27,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-12-17 10:07:28,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-17 10:07:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:28,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:28,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:28,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:28,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326230167] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:28,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:28,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2021-12-17 10:07:28,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259733352] [2021-12-17 10:07:28,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:28,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-17 10:07:28,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-17 10:07:28,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 10:07:28,864 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:31,891 INFO L93 Difference]: Finished difference Result 558 states and 582 transitions. [2021-12-17 10:07:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-17 10:07:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:31,892 INFO L225 Difference]: With dead ends: 558 [2021-12-17 10:07:31,892 INFO L226 Difference]: Without dead ends: 509 [2021-12-17 10:07:31,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7903 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3789, Invalid=18263, Unknown=0, NotChecked=0, Total=22052 [2021-12-17 10:07:31,893 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:31,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 391 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-17 10:07:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 97. [2021-12-17 10:07:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:32,107 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:32,107 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:32,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:32,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:32,107 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:32,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-12-17 10:07:32,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-12-17 10:07:32,308 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash -406298692, now seen corresponding path program 85 times [2021-12-17 10:07:32,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122955555] [2021-12-17 10:07:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:32,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 261 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:32,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122955555] [2021-12-17 10:07:32,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122955555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955178065] [2021-12-17 10:07:32,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:07:32,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:32,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:32,598 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:32,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-12-17 10:07:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:32,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:32,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:33,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:33,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955178065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:33,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:33,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2021-12-17 10:07:33,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197872399] [2021-12-17 10:07:33,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:33,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-17 10:07:33,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-17 10:07:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 10:07:33,447 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:36,492 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2021-12-17 10:07:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 10:07:36,492 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:36,492 INFO L225 Difference]: With dead ends: 613 [2021-12-17 10:07:36,493 INFO L226 Difference]: Without dead ends: 564 [2021-12-17 10:07:36,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8044 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3841, Invalid=18509, Unknown=0, NotChecked=0, Total=22350 [2021-12-17 10:07:36,494 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:36,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 364 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-12-17 10:07:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 97. [2021-12-17 10:07:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:36,718 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:36,718 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:36,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:36,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:36,719 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:36,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-12-17 10:07:36,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:36,932 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash 121868893, now seen corresponding path program 86 times [2021-12-17 10:07:36,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:36,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397978593] [2021-12-17 10:07:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:36,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:37,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:37,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397978593] [2021-12-17 10:07:37,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397978593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:37,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729797368] [2021-12-17 10:07:37,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:07:37,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:37,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:37,236 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:37,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-12-17 10:07:37,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:07:37,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:37,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:37,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:37,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:38,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729797368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:38,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:38,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 61 [2021-12-17 10:07:38,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242324879] [2021-12-17 10:07:38,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:38,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 10:07:38,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 10:07:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3025, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 10:07:38,074 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:41,204 INFO L93 Difference]: Finished difference Result 667 states and 693 transitions. [2021-12-17 10:07:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-17 10:07:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:41,206 INFO L225 Difference]: With dead ends: 667 [2021-12-17 10:07:41,206 INFO L226 Difference]: Without dead ends: 618 [2021-12-17 10:07:41,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7948 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3787, Invalid=18265, Unknown=0, NotChecked=0, Total=22052 [2021-12-17 10:07:41,207 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 257 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:41,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 418 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:41,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-12-17 10:07:41,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 97. [2021-12-17 10:07:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:41,443 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:41,443 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:41,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:41,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:41,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:41,443 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:41,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-12-17 10:07:41,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:41,647 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:41,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:41,648 INFO L85 PathProgramCache]: Analyzing trace with hash -969472100, now seen corresponding path program 87 times [2021-12-17 10:07:41,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:41,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251415934] [2021-12-17 10:07:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:41,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:41,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:41,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251415934] [2021-12-17 10:07:41,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251415934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:41,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171960711] [2021-12-17 10:07:41,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:07:41,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:41,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:41,940 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:41,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-12-17 10:07:41,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-17 10:07:41,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:41,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:42,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:42,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171960711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:42,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:42,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 60 [2021-12-17 10:07:42,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283547163] [2021-12-17 10:07:42,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:42,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-17 10:07:42,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:42,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-17 10:07:42,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 10:07:42,765 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:46,200 INFO L93 Difference]: Finished difference Result 720 states and 747 transitions. [2021-12-17 10:07:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 10:07:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:46,200 INFO L225 Difference]: With dead ends: 720 [2021-12-17 10:07:46,200 INFO L226 Difference]: Without dead ends: 671 [2021-12-17 10:07:46,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7612 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3630, Invalid=17540, Unknown=0, NotChecked=0, Total=21170 [2021-12-17 10:07:46,201 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 403 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:46,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 319 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-12-17 10:07:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 97. [2021-12-17 10:07:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:46,426 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:46,426 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:46,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:46,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:46,427 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:46,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-12-17 10:07:46,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-12-17 10:07:46,643 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash 242249341, now seen corresponding path program 88 times [2021-12-17 10:07:46,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:46,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801728415] [2021-12-17 10:07:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:46,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:46,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801728415] [2021-12-17 10:07:46,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801728415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835240803] [2021-12-17 10:07:46,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:07:46,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:46,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:46,948 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:46,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-12-17 10:07:46,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:07:46,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:46,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:46,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:47,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:47,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835240803] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:47,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:47,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 59 [2021-12-17 10:07:47,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485063923] [2021-12-17 10:07:47,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:47,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-17 10:07:47,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-17 10:07:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 10:07:47,744 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:51,257 INFO L93 Difference]: Finished difference Result 772 states and 800 transitions. [2021-12-17 10:07:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-17 10:07:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:51,257 INFO L225 Difference]: With dead ends: 772 [2021-12-17 10:07:51,258 INFO L226 Difference]: Without dead ends: 723 [2021-12-17 10:07:51,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7044 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3379, Invalid=16361, Unknown=0, NotChecked=0, Total=19740 [2021-12-17 10:07:51,258 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 297 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:51,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 386 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-12-17 10:07:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 97. [2021-12-17 10:07:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:51,495 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:51,495 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:51,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:51,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:51,495 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:51,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-12-17 10:07:51,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-12-17 10:07:51,696 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683524, now seen corresponding path program 89 times [2021-12-17 10:07:51,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640244270] [2021-12-17 10:07:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:51,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:51,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:51,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640244270] [2021-12-17 10:07:51,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640244270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:51,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485095023] [2021-12-17 10:07:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:07:51,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:51,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:51,993 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:51,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-12-17 10:07:52,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-17 10:07:52,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:52,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:52,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:52,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:52,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485095023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:52,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:52,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 58 [2021-12-17 10:07:52,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985287965] [2021-12-17 10:07:52,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:52,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-17 10:07:52,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-17 10:07:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 10:07:52,766 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:07:56,145 INFO L93 Difference]: Finished difference Result 823 states and 852 transitions. [2021-12-17 10:07:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-17 10:07:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:07:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:07:56,146 INFO L225 Difference]: With dead ends: 823 [2021-12-17 10:07:56,146 INFO L226 Difference]: Without dead ends: 774 [2021-12-17 10:07:56,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6264 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3049, Invalid=14773, Unknown=0, NotChecked=0, Total=17822 [2021-12-17 10:07:56,147 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 444 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:07:56,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 342 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:07:56,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-12-17 10:07:56,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 97. [2021-12-17 10:07:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:07:56,376 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:07:56,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:07:56,377 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:07:56,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:07:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:07:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:07:56,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:07:56,377 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:07:56,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-12-17 10:07:56,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:56,577 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:07:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:07:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash -43658595, now seen corresponding path program 90 times [2021-12-17 10:07:56,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:07:56,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66007939] [2021-12-17 10:07:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:07:56,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:07:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:07:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:56,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:07:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66007939] [2021-12-17 10:07:56,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66007939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:07:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301523336] [2021-12-17 10:07:56,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:07:56,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:07:56,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:07:56,870 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:07:56,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-12-17 10:07:56,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-17 10:07:56,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:07:56,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:07:56,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:07:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:57,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:07:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:07:57,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301523336] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:07:57,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:07:57,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2021-12-17 10:07:57,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367949719] [2021-12-17 10:07:57,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:07:57,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-17 10:07:57,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:07:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-17 10:07:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 10:07:57,648 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:01,112 INFO L93 Difference]: Finished difference Result 873 states and 903 transitions. [2021-12-17 10:08:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-17 10:08:01,112 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:08:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:01,113 INFO L225 Difference]: With dead ends: 873 [2021-12-17 10:08:01,113 INFO L226 Difference]: Without dead ends: 824 [2021-12-17 10:08:01,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2661, Invalid=12839, Unknown=0, NotChecked=0, Total=15500 [2021-12-17 10:08:01,114 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 375 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:01,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 411 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-12-17 10:08:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 97. [2021-12-17 10:08:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:08:01,350 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:08:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:01,350 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:08:01,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:08:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:08:01,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:01,351 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:01,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-12-17 10:08:01,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:01,551 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:01,552 INFO L85 PathProgramCache]: Analyzing trace with hash -559169700, now seen corresponding path program 91 times [2021-12-17 10:08:01,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:01,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059221258] [2021-12-17 10:08:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:01,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:01,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059221258] [2021-12-17 10:08:01,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059221258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142004343] [2021-12-17 10:08:01,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:08:01,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:01,863 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:01,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-12-17 10:08:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:01,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:08:01,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:02,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:02,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142004343] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:02,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:02,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2021-12-17 10:08:02,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175109447] [2021-12-17 10:08:02,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:02,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-17 10:08:02,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:02,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-17 10:08:02,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2021-12-17 10:08:02,613 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:05,944 INFO L93 Difference]: Finished difference Result 922 states and 953 transitions. [2021-12-17 10:08:05,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-17 10:08:05,944 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:08:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:05,945 INFO L225 Difference]: With dead ends: 922 [2021-12-17 10:08:05,945 INFO L226 Difference]: Without dead ends: 873 [2021-12-17 10:08:05,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2242, Invalid=10640, Unknown=0, NotChecked=0, Total=12882 [2021-12-17 10:08:05,946 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 563 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:05,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 371 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-12-17 10:08:06,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 97. [2021-12-17 10:08:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2021-12-17 10:08:06,182 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2021-12-17 10:08:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:06,182 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2021-12-17 10:08:06,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2021-12-17 10:08:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 10:08:06,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:06,182 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:06,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-12-17 10:08:06,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-12-17 10:08:06,383 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:06,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1129988419, now seen corresponding path program 14 times [2021-12-17 10:08:06,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:06,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451897620] [2021-12-17 10:08:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:06,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:06,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:06,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451897620] [2021-12-17 10:08:06,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451897620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:06,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839174803] [2021-12-17 10:08:06,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:08:06,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:06,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:06,692 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:06,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-12-17 10:08:06,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:08:06,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:06,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 10:08:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:07,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:07,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839174803] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:07,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:07,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 55 [2021-12-17 10:08:07,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202187507] [2021-12-17 10:08:07,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:07,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-17 10:08:07,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-17 10:08:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 10:08:07,425 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:10,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:10,744 INFO L93 Difference]: Finished difference Result 973 states and 1006 transitions. [2021-12-17 10:08:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-17 10:08:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 10:08:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:10,745 INFO L225 Difference]: With dead ends: 973 [2021-12-17 10:08:10,745 INFO L226 Difference]: Without dead ends: 924 [2021-12-17 10:08:10,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3006 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1841, Invalid=8259, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 10:08:10,746 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 484 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:10,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 356 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-12-17 10:08:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 99. [2021-12-17 10:08:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.183673469387755) internal successors, (116), 98 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2021-12-17 10:08:10,987 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 67 [2021-12-17 10:08:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:10,987 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2021-12-17 10:08:10,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2021-12-17 10:08:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 10:08:10,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:10,987 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:11,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-12-17 10:08:11,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-12-17 10:08:11,188 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1945821609, now seen corresponding path program 28 times [2021-12-17 10:08:11,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:11,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875266610] [2021-12-17 10:08:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:11,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:11,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875266610] [2021-12-17 10:08:11,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875266610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549653115] [2021-12-17 10:08:11,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:08:11,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:11,331 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:11,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-12-17 10:08:11,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:08:11,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 10:08:11,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:11,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:11,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549653115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:11,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:11,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2021-12-17 10:08:11,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103468318] [2021-12-17 10:08:11,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:11,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 10:08:11,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:11,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 10:08:11,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-12-17 10:08:11,563 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:12,062 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2021-12-17 10:08:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 10:08:12,062 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-17 10:08:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:12,062 INFO L225 Difference]: With dead ends: 110 [2021-12-17 10:08:12,062 INFO L226 Difference]: Without dead ends: 108 [2021-12-17 10:08:12,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 10:08:12,063 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 75 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:12,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 242 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:08:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-17 10:08:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2021-12-17 10:08:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:12,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2021-12-17 10:08:12,365 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 68 [2021-12-17 10:08:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:12,365 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2021-12-17 10:08:12,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2021-12-17 10:08:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:12,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:12,366 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:12,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-12-17 10:08:12,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-12-17 10:08:12,566 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1206883513, now seen corresponding path program 29 times [2021-12-17 10:08:12,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:12,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251451243] [2021-12-17 10:08:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:12,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:12,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251451243] [2021-12-17 10:08:12,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251451243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:12,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256982283] [2021-12-17 10:08:12,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:08:12,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:12,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:12,937 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:12,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-12-17 10:08:12,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-17 10:08:12,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:12,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:13,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:14,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256982283] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:14,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:14,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2021-12-17 10:08:14,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903032694] [2021-12-17 10:08:14,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:14,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-17 10:08:14,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-17 10:08:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4259, Unknown=0, NotChecked=0, Total=5256 [2021-12-17 10:08:14,041 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:15,310 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2021-12-17 10:08:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 10:08:15,310 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 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 71 [2021-12-17 10:08:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:15,311 INFO L225 Difference]: With dead ends: 220 [2021-12-17 10:08:15,311 INFO L226 Difference]: Without dead ends: 168 [2021-12-17 10:08:15,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2072, Invalid=9270, Unknown=0, NotChecked=0, Total=11342 [2021-12-17 10:08:15,312 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:15,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 308 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-17 10:08:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 103. [2021-12-17 10:08:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:08:15,579 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:08:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:15,579 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:08:15,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:08:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:15,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:15,579 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:15,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-12-17 10:08:15,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-12-17 10:08:15,780 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash -962976904, now seen corresponding path program 92 times [2021-12-17 10:08:15,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:15,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134674216] [2021-12-17 10:08:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:15,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:16,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134674216] [2021-12-17 10:08:16,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134674216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015578201] [2021-12-17 10:08:16,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:08:16,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:16,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:16,129 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:16,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-12-17 10:08:16,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:08:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:16,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:16,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:17,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:17,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015578201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:17,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:17,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 72 [2021-12-17 10:08:17,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775747441] [2021-12-17 10:08:17,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:17,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-17 10:08:17,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:17,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-17 10:08:17,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 10:08:17,207 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:19,198 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2021-12-17 10:08:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 10:08:19,199 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 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 71 [2021-12-17 10:08:19,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:19,199 INFO L225 Difference]: With dead ends: 285 [2021-12-17 10:08:19,199 INFO L226 Difference]: Without dead ends: 233 [2021-12-17 10:08:19,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2530, Invalid=11990, Unknown=0, NotChecked=0, Total=14520 [2021-12-17 10:08:19,200 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 69 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:19,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 377 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-17 10:08:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 103. [2021-12-17 10:08:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:08:19,489 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:08:19,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:19,489 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:08:19,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:19,489 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:08:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:19,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:19,490 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:19,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-12-17 10:08:19,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-12-17 10:08:19,693 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:19,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1460879577, now seen corresponding path program 93 times [2021-12-17 10:08:19,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:19,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156266230] [2021-12-17 10:08:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:19,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:20,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:20,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156266230] [2021-12-17 10:08:20,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156266230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560832121] [2021-12-17 10:08:20,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:08:20,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:20,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:20,052 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:20,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-12-17 10:08:20,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 10:08:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:21,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:21,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560832121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:21,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:21,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 71 [2021-12-17 10:08:21,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030702870] [2021-12-17 10:08:21,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:21,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-17 10:08:21,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:21,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-17 10:08:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=4067, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 10:08:21,135 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:23,645 INFO L93 Difference]: Finished difference Result 349 states and 370 transitions. [2021-12-17 10:08:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-17 10:08:23,646 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 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 71 [2021-12-17 10:08:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:23,646 INFO L225 Difference]: With dead ends: 349 [2021-12-17 10:08:23,646 INFO L226 Difference]: Without dead ends: 297 [2021-12-17 10:08:23,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6067 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3015, Invalid=14541, Unknown=0, NotChecked=0, Total=17556 [2021-12-17 10:08:23,647 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 100 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:23,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 345 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:23,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-17 10:08:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 103. [2021-12-17 10:08:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:08:23,949 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:08:23,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:23,949 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:08:23,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:08:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:23,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:23,950 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:23,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-12-17 10:08:24,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-12-17 10:08:24,151 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1816163160, now seen corresponding path program 94 times [2021-12-17 10:08:24,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:24,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176084654] [2021-12-17 10:08:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:24,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:24,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176084654] [2021-12-17 10:08:24,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176084654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32183949] [2021-12-17 10:08:24,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:08:24,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:24,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:24,506 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:24,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-12-17 10:08:24,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:08:24,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:24,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:24,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:25,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:25,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32183949] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:25,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:25,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 70 [2021-12-17 10:08:25,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248730936] [2021-12-17 10:08:25,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:25,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-17 10:08:25,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-17 10:08:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=3968, Unknown=0, NotChecked=0, Total=4830 [2021-12-17 10:08:25,546 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:28,434 INFO L93 Difference]: Finished difference Result 412 states and 434 transitions. [2021-12-17 10:08:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 10:08:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 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 71 [2021-12-17 10:08:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:28,435 INFO L225 Difference]: With dead ends: 412 [2021-12-17 10:08:28,435 INFO L226 Difference]: Without dead ends: 360 [2021-12-17 10:08:28,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7121 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3474, Invalid=16832, Unknown=0, NotChecked=0, Total=20306 [2021-12-17 10:08:28,436 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 118 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:28,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 408 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-17 10:08:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 103. [2021-12-17 10:08:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:08:28,747 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:08:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:28,747 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:08:28,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:08:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:28,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:28,748 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:28,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-12-17 10:08:28,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-12-17 10:08:28,948 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2104718585, now seen corresponding path program 95 times [2021-12-17 10:08:28,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:28,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879447828] [2021-12-17 10:08:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:28,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:29,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:29,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879447828] [2021-12-17 10:08:29,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879447828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:29,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112063640] [2021-12-17 10:08:29,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:08:29,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:29,301 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:29,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-12-17 10:08:29,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-17 10:08:29,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:29,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:29,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:30,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:30,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112063640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:30,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:30,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 69 [2021-12-17 10:08:30,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032741026] [2021-12-17 10:08:30,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:30,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-17 10:08:30,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:30,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-17 10:08:30,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=3867, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 10:08:30,304 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:33,261 INFO L93 Difference]: Finished difference Result 474 states and 497 transitions. [2021-12-17 10:08:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-17 10:08:33,261 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 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 71 [2021-12-17 10:08:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:33,262 INFO L225 Difference]: With dead ends: 474 [2021-12-17 10:08:33,262 INFO L226 Difference]: Without dead ends: 422 [2021-12-17 10:08:33,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8046 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3877, Invalid=18773, Unknown=0, NotChecked=0, Total=22650 [2021-12-17 10:08:33,263 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 137 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:33,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 389 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-17 10:08:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 103. [2021-12-17 10:08:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:08:33,568 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:08:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:33,569 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:08:33,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:08:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:33,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:33,569 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:33,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-12-17 10:08:33,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-12-17 10:08:33,769 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:33,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1559837496, now seen corresponding path program 96 times [2021-12-17 10:08:33,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:33,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6104827] [2021-12-17 10:08:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:33,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:34,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:34,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6104827] [2021-12-17 10:08:34,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6104827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:34,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303036292] [2021-12-17 10:08:34,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:08:34,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:34,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:34,105 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:34,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-12-17 10:08:34,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-17 10:08:34,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:34,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:34,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:34,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:35,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303036292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:35,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:35,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 68 [2021-12-17 10:08:35,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067060581] [2021-12-17 10:08:35,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:35,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-17 10:08:35,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-17 10:08:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=3764, Unknown=0, NotChecked=0, Total=4556 [2021-12-17 10:08:35,095 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:38,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:38,446 INFO L93 Difference]: Finished difference Result 535 states and 559 transitions. [2021-12-17 10:08:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-17 10:08:38,446 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 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 71 [2021-12-17 10:08:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:38,447 INFO L225 Difference]: With dead ends: 535 [2021-12-17 10:08:38,447 INFO L226 Difference]: Without dead ends: 483 [2021-12-17 10:08:38,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8792 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4200, Invalid=20292, Unknown=0, NotChecked=0, Total=24492 [2021-12-17 10:08:38,448 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 172 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:38,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 403 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-17 10:08:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 103. [2021-12-17 10:08:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:08:38,753 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:08:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:38,753 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:08:38,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:08:38,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:38,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:38,754 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:38,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-12-17 10:08:38,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:38,954 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash -258854631, now seen corresponding path program 97 times [2021-12-17 10:08:38,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:38,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392812903] [2021-12-17 10:08:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:38,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:39,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392812903] [2021-12-17 10:08:39,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392812903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780715443] [2021-12-17 10:08:39,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:08:39,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:39,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:39,293 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:39,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-12-17 10:08:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:39,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:39,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:40,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:40,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780715443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:40,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:40,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 67 [2021-12-17 10:08:40,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844838219] [2021-12-17 10:08:40,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:40,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-17 10:08:40,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:40,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-17 10:08:40,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3659, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 10:08:40,274 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:43,987 INFO L93 Difference]: Finished difference Result 595 states and 620 transitions. [2021-12-17 10:08:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-12-17 10:08:43,987 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 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 71 [2021-12-17 10:08:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:43,988 INFO L225 Difference]: With dead ends: 595 [2021-12-17 10:08:43,988 INFO L226 Difference]: Without dead ends: 543 [2021-12-17 10:08:43,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9321 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4425, Invalid=21335, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 10:08:43,989 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 297 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:43,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 263 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:43,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-12-17 10:08:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 103. [2021-12-17 10:08:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:08:44,337 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:08:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:44,337 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:08:44,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:08:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:44,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:44,337 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:44,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-12-17 10:08:44,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:44,538 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:44,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:44,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1425900776, now seen corresponding path program 98 times [2021-12-17 10:08:44,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:44,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759912932] [2021-12-17 10:08:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:44,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:44,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:44,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759912932] [2021-12-17 10:08:44,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759912932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:44,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323471259] [2021-12-17 10:08:44,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:08:44,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:44,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:44,860 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:44,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-12-17 10:08:44,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:08:44,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:44,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:45,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:45,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323471259] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:45,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:45,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 66 [2021-12-17 10:08:45,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520095949] [2021-12-17 10:08:45,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:45,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-17 10:08:45,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-17 10:08:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3552, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 10:08:45,774 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:49,911 INFO L93 Difference]: Finished difference Result 654 states and 680 transitions. [2021-12-17 10:08:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-17 10:08:49,911 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 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 71 [2021-12-17 10:08:49,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:49,912 INFO L225 Difference]: With dead ends: 654 [2021-12-17 10:08:49,912 INFO L226 Difference]: Without dead ends: 602 [2021-12-17 10:08:49,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9607 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4540, Invalid=21866, Unknown=0, NotChecked=0, Total=26406 [2021-12-17 10:08:49,913 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 220 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:49,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 391 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-12-17 10:08:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 103. [2021-12-17 10:08:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:08:50,239 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:08:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:50,239 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:08:50,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:08:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:50,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:50,240 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:50,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-12-17 10:08:50,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:50,440 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:50,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1584493881, now seen corresponding path program 99 times [2021-12-17 10:08:50,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:50,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256490299] [2021-12-17 10:08:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:50,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:50,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256490299] [2021-12-17 10:08:50,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256490299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266122372] [2021-12-17 10:08:50,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:08:50,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:50,785 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:50,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-12-17 10:08:50,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 10:08:50,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:50,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:51,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266122372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:51,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:51,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 65 [2021-12-17 10:08:51,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187603150] [2021-12-17 10:08:51,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:51,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 10:08:51,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:51,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 10:08:51,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=3443, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:08:51,749 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:08:55,897 INFO L93 Difference]: Finished difference Result 712 states and 739 transitions. [2021-12-17 10:08:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-17 10:08:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 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 71 [2021-12-17 10:08:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:08:55,898 INFO L225 Difference]: With dead ends: 712 [2021-12-17 10:08:55,898 INFO L226 Difference]: Without dead ends: 660 [2021-12-17 10:08:55,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9636 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4539, Invalid=21867, Unknown=0, NotChecked=0, Total=26406 [2021-12-17 10:08:55,899 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 251 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:08:55,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 391 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:08:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-17 10:08:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 103. [2021-12-17 10:08:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:08:56,238 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:08:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:08:56,238 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:08:56,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:08:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:08:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:08:56,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:08:56,238 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:08:56,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-12-17 10:08:56,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:56,439 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:08:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:08:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash -535153928, now seen corresponding path program 100 times [2021-12-17 10:08:56,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:08:56,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069346943] [2021-12-17 10:08:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:08:56,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:08:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:08:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:56,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:08:56,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069346943] [2021-12-17 10:08:56,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069346943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:08:56,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712778318] [2021-12-17 10:08:56,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:08:56,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:08:56,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:08:56,768 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:08:56,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-12-17 10:08:56,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:08:56,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:08:56,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:08:56,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:08:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:57,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:08:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:08:57,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712778318] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:08:57,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:08:57,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 64 [2021-12-17 10:08:57,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189492736] [2021-12-17 10:08:57,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:08:57,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-17 10:08:57,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:08:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-17 10:08:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=3332, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 10:08:57,655 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:02,045 INFO L93 Difference]: Finished difference Result 769 states and 797 transitions. [2021-12-17 10:09:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-17 10:09:02,045 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 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 71 [2021-12-17 10:09:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:02,046 INFO L225 Difference]: With dead ends: 769 [2021-12-17 10:09:02,046 INFO L226 Difference]: Without dead ends: 717 [2021-12-17 10:09:02,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9402 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4422, Invalid=21338, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 10:09:02,047 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 367 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:02,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 374 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:09:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-12-17 10:09:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 103. [2021-12-17 10:09:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:09:02,358 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:09:02,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:02,358 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:09:02,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:09:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:09:02,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:02,359 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:02,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-12-17 10:09:02,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-12-17 10:09:02,559 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:02,560 INFO L85 PathProgramCache]: Analyzing trace with hash 227754329, now seen corresponding path program 101 times [2021-12-17 10:09:02,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:02,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336476644] [2021-12-17 10:09:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:02,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:02,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336476644] [2021-12-17 10:09:02,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336476644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865172301] [2021-12-17 10:09:02,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:09:02,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:02,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:02,885 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:02,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-12-17 10:09:02,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-17 10:09:02,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:02,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:09:02,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:03,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:03,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865172301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:03,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:03,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 63 [2021-12-17 10:09:03,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63015094] [2021-12-17 10:09:03,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:03,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-17 10:09:03,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:03,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-17 10:09:03,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=3219, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 10:09:03,815 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:08,465 INFO L93 Difference]: Finished difference Result 825 states and 854 transitions. [2021-12-17 10:09:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-17 10:09:08,465 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 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 71 [2021-12-17 10:09:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:08,466 INFO L225 Difference]: With dead ends: 825 [2021-12-17 10:09:08,466 INFO L226 Difference]: Without dead ends: 773 [2021-12-17 10:09:08,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4195, Invalid=20297, Unknown=0, NotChecked=0, Total=24492 [2021-12-17 10:09:08,467 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 407 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:08,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 384 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:09:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-12-17 10:09:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 103. [2021-12-17 10:09:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:09:08,781 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:09:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:08,781 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:09:08,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:09:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:09:08,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:08,782 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:08,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-12-17 10:09:08,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:08,998 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:08,998 INFO L85 PathProgramCache]: Analyzing trace with hash -578919720, now seen corresponding path program 102 times [2021-12-17 10:09:08,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:08,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492011097] [2021-12-17 10:09:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:08,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:09,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:09,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492011097] [2021-12-17 10:09:09,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492011097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:09,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606615949] [2021-12-17 10:09:09,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:09:09,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:09,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:09,331 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:09,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-12-17 10:09:09,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-17 10:09:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:09:09,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:10,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:10,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606615949] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:10,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:10,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 62 [2021-12-17 10:09:10,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723301110] [2021-12-17 10:09:10,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:10,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-17 10:09:10,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-17 10:09:10,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3104, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 10:09:10,205 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:14,781 INFO L93 Difference]: Finished difference Result 880 states and 910 transitions. [2021-12-17 10:09:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-12-17 10:09:14,781 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 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 71 [2021-12-17 10:09:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:14,782 INFO L225 Difference]: With dead ends: 880 [2021-12-17 10:09:14,782 INFO L226 Difference]: Without dead ends: 828 [2021-12-17 10:09:14,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8165 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3870, Invalid=18780, Unknown=0, NotChecked=0, Total=22650 [2021-12-17 10:09:14,783 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 413 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:14,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 398 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:09:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-12-17 10:09:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 103. [2021-12-17 10:09:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:09:15,116 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:09:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:15,116 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:09:15,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:09:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:09:15,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:15,116 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:15,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-12-17 10:09:15,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-12-17 10:09:15,317 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:15,317 INFO L85 PathProgramCache]: Analyzing trace with hash -50752135, now seen corresponding path program 103 times [2021-12-17 10:09:15,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:15,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500666190] [2021-12-17 10:09:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:15,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:15,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:15,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500666190] [2021-12-17 10:09:15,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500666190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:15,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032450691] [2021-12-17 10:09:15,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:09:15,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:15,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:15,643 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:15,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-12-17 10:09:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:09:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:16,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:16,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032450691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:16,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:16,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 61 [2021-12-17 10:09:16,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209966543] [2021-12-17 10:09:16,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:16,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 10:09:16,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 10:09:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 10:09:16,487 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:21,265 INFO L93 Difference]: Finished difference Result 934 states and 965 transitions. [2021-12-17 10:09:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-17 10:09:21,265 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 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 71 [2021-12-17 10:09:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:21,266 INFO L225 Difference]: With dead ends: 934 [2021-12-17 10:09:21,266 INFO L226 Difference]: Without dead ends: 882 [2021-12-17 10:09:21,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3465, Invalid=16841, Unknown=0, NotChecked=0, Total=20306 [2021-12-17 10:09:21,267 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 456 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:21,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 425 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:09:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-12-17 10:09:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 103. [2021-12-17 10:09:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:09:21,630 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:09:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:21,631 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:09:21,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:09:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:09:21,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:21,631 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:21,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-12-17 10:09:21,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-12-17 10:09:21,832 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:21,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:21,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1142093128, now seen corresponding path program 104 times [2021-12-17 10:09:21,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:21,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838938288] [2021-12-17 10:09:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:21,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:22,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:22,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838938288] [2021-12-17 10:09:22,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838938288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:22,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694202161] [2021-12-17 10:09:22,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:09:22,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:22,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:22,172 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:22,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-12-17 10:09:22,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:09:22,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:22,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:09:22,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:22,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:22,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694202161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:22,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:22,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 60 [2021-12-17 10:09:22,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580691854] [2021-12-17 10:09:22,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:22,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-17 10:09:22,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-17 10:09:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 10:09:22,999 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:27,658 INFO L93 Difference]: Finished difference Result 987 states and 1019 transitions. [2021-12-17 10:09:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-17 10:09:27,658 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 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 71 [2021-12-17 10:09:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:27,659 INFO L225 Difference]: With dead ends: 987 [2021-12-17 10:09:27,659 INFO L226 Difference]: Without dead ends: 935 [2021-12-17 10:09:27,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6056 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3004, Invalid=14552, Unknown=0, NotChecked=0, Total=17556 [2021-12-17 10:09:27,660 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 558 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:27,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 423 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:09:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-12-17 10:09:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 103. [2021-12-17 10:09:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:09:28,022 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:09:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:28,022 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:09:28,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:09:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:09:28,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:28,023 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:28,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-12-17 10:09:28,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:28,223 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash 69628313, now seen corresponding path program 105 times [2021-12-17 10:09:28,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:28,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566969515] [2021-12-17 10:09:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:28,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:28,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566969515] [2021-12-17 10:09:28,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566969515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397668242] [2021-12-17 10:09:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:09:28,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:28,564 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:28,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-12-17 10:09:28,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 10:09:28,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:28,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:09:28,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:29,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:29,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397668242] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:29,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:29,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 59 [2021-12-17 10:09:29,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272252167] [2021-12-17 10:09:29,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:29,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-17 10:09:29,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:29,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-17 10:09:29,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=2747, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 10:09:29,422 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:34,061 INFO L93 Difference]: Finished difference Result 1039 states and 1072 transitions. [2021-12-17 10:09:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 10:09:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 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 71 [2021-12-17 10:09:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:34,062 INFO L225 Difference]: With dead ends: 1039 [2021-12-17 10:09:34,062 INFO L226 Difference]: Without dead ends: 987 [2021-12-17 10:09:34,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4743 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2517, Invalid=12003, Unknown=0, NotChecked=0, Total=14520 [2021-12-17 10:09:34,063 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 475 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:34,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 456 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:09:34,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-12-17 10:09:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 103. [2021-12-17 10:09:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-12-17 10:09:34,393 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2021-12-17 10:09:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:34,393 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-12-17 10:09:34,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-12-17 10:09:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 10:09:34,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:34,393 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:34,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-12-17 10:09:34,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-12-17 10:09:34,594 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:34,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:34,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1415304552, now seen corresponding path program 15 times [2021-12-17 10:09:34,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:34,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186319803] [2021-12-17 10:09:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:34,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:34,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:34,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186319803] [2021-12-17 10:09:34,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186319803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:34,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083281799] [2021-12-17 10:09:34,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:09:34,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:34,935 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:34,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-12-17 10:09:34,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 10:09:34,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:34,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 10:09:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:35,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:35,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083281799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:35,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:35,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 58 [2021-12-17 10:09:35,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655957237] [2021-12-17 10:09:35,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:35,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-17 10:09:35,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:35,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-17 10:09:35,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2624, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 10:09:35,748 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:40,566 INFO L93 Difference]: Finished difference Result 1093 states and 1128 transitions. [2021-12-17 10:09:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-17 10:09:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 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 71 [2021-12-17 10:09:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:40,567 INFO L225 Difference]: With dead ends: 1093 [2021-12-17 10:09:40,567 INFO L226 Difference]: Without dead ends: 1041 [2021-12-17 10:09:40,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3399 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2057, Invalid=9285, Unknown=0, NotChecked=0, Total=11342 [2021-12-17 10:09:40,568 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 591 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:40,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 316 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:09:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-12-17 10:09:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 105. [2021-12-17 10:09:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 104 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2021-12-17 10:09:40,933 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 71 [2021-12-17 10:09:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:40,933 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2021-12-17 10:09:40,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2021-12-17 10:09:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 10:09:40,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:40,933 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:40,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-12-17 10:09:41,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:41,147 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1329099827, now seen corresponding path program 30 times [2021-12-17 10:09:41,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479238022] [2021-12-17 10:09:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:41,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:41,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:41,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479238022] [2021-12-17 10:09:41,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479238022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:41,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912474515] [2021-12-17 10:09:41,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:09:41,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:41,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:41,292 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:41,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-12-17 10:09:41,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-17 10:09:41,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 10:09:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:41,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:41,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912474515] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:41,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:41,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2021-12-17 10:09:41,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093090308] [2021-12-17 10:09:41,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:41,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 10:09:41,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 10:09:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2021-12-17 10:09:41,576 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:42,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:42,313 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-12-17 10:09:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 10:09:42,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-17 10:09:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:42,314 INFO L225 Difference]: With dead ends: 116 [2021-12-17 10:09:42,314 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 10:09:42,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 10:09:42,314 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 94 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:42,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 253 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:09:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 10:09:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2021-12-17 10:09:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2021-12-17 10:09:42,687 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 72 [2021-12-17 10:09:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:42,687 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2021-12-17 10:09:42,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2021-12-17 10:09:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:09:42,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:42,687 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:42,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-12-17 10:09:42,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:42,903 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:42,903 INFO L85 PathProgramCache]: Analyzing trace with hash -85712547, now seen corresponding path program 31 times [2021-12-17 10:09:42,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:42,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554350769] [2021-12-17 10:09:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:42,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:43,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:43,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554350769] [2021-12-17 10:09:43,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554350769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:43,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268842389] [2021-12-17 10:09:43,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:09:43,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:43,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:43,305 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:43,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-12-17 10:09:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:09:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:44,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:44,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268842389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:44,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:44,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2021-12-17 10:09:44,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238351379] [2021-12-17 10:09:44,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:44,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-17 10:09:44,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:44,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-17 10:09:44,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=4743, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 10:09:44,525 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:46,164 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2021-12-17 10:09:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 10:09:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:09:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:46,165 INFO L225 Difference]: With dead ends: 233 [2021-12-17 10:09:46,165 INFO L226 Difference]: Without dead ends: 178 [2021-12-17 10:09:46,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2301, Invalid=10355, Unknown=0, NotChecked=0, Total=12656 [2021-12-17 10:09:46,166 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:46,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 345 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:09:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-17 10:09:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2021-12-17 10:09:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:09:46,561 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:09:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:46,562 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:09:46,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:09:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:09:46,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:46,562 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:46,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-12-17 10:09:46,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:46,778 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash -266651492, now seen corresponding path program 106 times [2021-12-17 10:09:46,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:46,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219824482] [2021-12-17 10:09:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:46,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 346 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:47,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:47,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219824482] [2021-12-17 10:09:47,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219824482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:47,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290240800] [2021-12-17 10:09:47,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:09:47,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:47,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:47,160 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:47,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-12-17 10:09:47,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:09:47,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:47,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:09:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:48,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:48,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290240800] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:48,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:48,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 76 [2021-12-17 10:09:48,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75134905] [2021-12-17 10:09:48,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:48,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-17 10:09:48,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-17 10:09:48,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4643, Unknown=0, NotChecked=0, Total=5700 [2021-12-17 10:09:48,277 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:50,276 INFO L93 Difference]: Finished difference Result 302 states and 323 transitions. [2021-12-17 10:09:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 10:09:50,276 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:09:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:50,277 INFO L225 Difference]: With dead ends: 302 [2021-12-17 10:09:50,277 INFO L226 Difference]: Without dead ends: 247 [2021-12-17 10:09:50,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5553 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2822, Invalid=13434, Unknown=0, NotChecked=0, Total=16256 [2021-12-17 10:09:50,278 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:50,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 294 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:09:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-17 10:09:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 109. [2021-12-17 10:09:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:09:50,668 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:09:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:50,668 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:09:50,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:09:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:09:50,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:50,669 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:50,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-12-17 10:09:50,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:50,871 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash 974437757, now seen corresponding path program 107 times [2021-12-17 10:09:50,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:50,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690787032] [2021-12-17 10:09:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:50,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 346 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:51,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:51,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690787032] [2021-12-17 10:09:51,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690787032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:51,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214241877] [2021-12-17 10:09:51,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:09:51,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:51,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:51,263 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:51,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-12-17 10:09:51,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-17 10:09:51,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:51,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:09:51,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:52,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:52,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214241877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:52,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:52,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 75 [2021-12-17 10:09:52,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863194667] [2021-12-17 10:09:52,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:52,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-17 10:09:52,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-17 10:09:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1009, Invalid=4541, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 10:09:52,426 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:55,470 INFO L93 Difference]: Finished difference Result 370 states and 392 transitions. [2021-12-17 10:09:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 10:09:55,470 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:09:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:55,471 INFO L225 Difference]: With dead ends: 370 [2021-12-17 10:09:55,471 INFO L226 Difference]: Without dead ends: 315 [2021-12-17 10:09:55,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6864 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3380, Invalid=16360, Unknown=0, NotChecked=0, Total=19740 [2021-12-17 10:09:55,472 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:55,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 403 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:09:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-17 10:09:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 109. [2021-12-17 10:09:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:09:55,868 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:09:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:55,868 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:09:55,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:09:55,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:09:55,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:55,868 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:55,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-12-17 10:09:56,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:56,069 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1202284420, now seen corresponding path program 108 times [2021-12-17 10:09:56,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:56,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952933825] [2021-12-17 10:09:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:56,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 346 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:56,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:56,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952933825] [2021-12-17 10:09:56,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952933825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:56,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497921113] [2021-12-17 10:09:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:09:56,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:56,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:56,439 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:09:56,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-12-17 10:09:56,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-17 10:09:56,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:09:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:57,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:57,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497921113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:57,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:57,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 74 [2021-12-17 10:09:57,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310945725] [2021-12-17 10:09:57,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:57,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-17 10:09:57,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-17 10:09:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=965, Invalid=4437, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 10:09:57,522 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:01,226 INFO L93 Difference]: Finished difference Result 437 states and 460 transitions. [2021-12-17 10:10:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-17 10:10:01,226 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:10:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:01,226 INFO L225 Difference]: With dead ends: 437 [2021-12-17 10:10:01,226 INFO L226 Difference]: Without dead ends: 382 [2021-12-17 10:10:01,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8101 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3918, Invalid=19034, Unknown=0, NotChecked=0, Total=22952 [2021-12-17 10:10:01,227 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 114 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:01,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 365 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:10:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-17 10:10:01,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 109. [2021-12-17 10:10:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:10:01,632 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:10:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:01,632 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:10:01,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:10:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:10:01,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:10:01,632 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:10:01,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-12-17 10:10:01,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:01,833 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:10:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:10:01,833 INFO L85 PathProgramCache]: Analyzing trace with hash 251519389, now seen corresponding path program 109 times [2021-12-17 10:10:01,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:10:01,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174688494] [2021-12-17 10:10:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:10:01,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:10:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 346 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:02,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:10:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174688494] [2021-12-17 10:10:02,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174688494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:10:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442590255] [2021-12-17 10:10:02,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:10:02,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:02,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:10:02,197 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:10:02,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-12-17 10:10:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:02,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:10:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:10:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:03,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:10:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:03,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442590255] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:10:03,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:10:03,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 73 [2021-12-17 10:10:03,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168821155] [2021-12-17 10:10:03,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:10:03,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-17 10:10:03,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:10:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-17 10:10:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=925, Invalid=4331, Unknown=0, NotChecked=0, Total=5256 [2021-12-17 10:10:03,275 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:07,203 INFO L93 Difference]: Finished difference Result 503 states and 527 transitions. [2021-12-17 10:10:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-17 10:10:07,203 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:10:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:07,204 INFO L225 Difference]: With dead ends: 503 [2021-12-17 10:10:07,204 INFO L226 Difference]: Without dead ends: 448 [2021-12-17 10:10:07,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9214 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4403, Invalid=21357, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 10:10:07,205 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 188 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:07,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 376 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:10:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-17 10:10:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 109. [2021-12-17 10:10:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:10:07,601 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:10:07,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:07,602 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:10:07,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:10:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:10:07,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:10:07,602 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:10:07,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-12-17 10:10:07,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-12-17 10:10:07,809 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:10:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:10:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1918341028, now seen corresponding path program 110 times [2021-12-17 10:10:07,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:10:07,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064248237] [2021-12-17 10:10:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:10:07,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:10:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 346 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:08,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:10:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064248237] [2021-12-17 10:10:08,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064248237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:10:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180063371] [2021-12-17 10:10:08,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:10:08,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:08,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:10:08,167 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:10:08,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-12-17 10:10:08,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:10:08,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:10:08,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:10:08,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:10:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:09,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:10:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:09,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180063371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:10:09,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:10:09,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 72 [2021-12-17 10:10:09,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630693457] [2021-12-17 10:10:09,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:10:09,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-17 10:10:09,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:10:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-17 10:10:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=4223, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 10:10:09,233 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:13,678 INFO L93 Difference]: Finished difference Result 568 states and 593 transitions. [2021-12-17 10:10:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-17 10:10:13,678 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:10:13,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:13,679 INFO L225 Difference]: With dead ends: 568 [2021-12-17 10:10:13,679 INFO L226 Difference]: Without dead ends: 513 [2021-12-17 10:10:13,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10147 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4808, Invalid=23248, Unknown=0, NotChecked=0, Total=28056 [2021-12-17 10:10:13,680 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 183 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:13,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 380 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:10:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-12-17 10:10:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 109. [2021-12-17 10:10:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:10:14,173 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:10:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:14,173 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:10:14,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:10:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:10:14,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:10:14,174 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:10:14,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-12-17 10:10:14,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-12-17 10:10:14,375 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:10:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:10:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 505515453, now seen corresponding path program 111 times [2021-12-17 10:10:14,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:10:14,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724470768] [2021-12-17 10:10:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:10:14,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:10:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 346 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:14,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:10:14,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724470768] [2021-12-17 10:10:14,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724470768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:10:14,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940179360] [2021-12-17 10:10:14,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:10:14,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:10:14,761 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:10:14,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-12-17 10:10:14,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-17 10:10:14,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:10:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:10:14,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:10:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:15,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:10:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:15,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940179360] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:10:15,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:10:15,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 71 [2021-12-17 10:10:15,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167498518] [2021-12-17 10:10:15,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:10:15,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-17 10:10:15,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:10:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-17 10:10:15,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=4113, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 10:10:15,870 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:20,595 INFO L93 Difference]: Finished difference Result 632 states and 658 transitions. [2021-12-17 10:10:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-17 10:10:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:10:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:20,596 INFO L225 Difference]: With dead ends: 632 [2021-12-17 10:10:20,596 INFO L226 Difference]: Without dead ends: 577 [2021-12-17 10:10:20,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10856 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5112, Invalid=24644, Unknown=0, NotChecked=0, Total=29756 [2021-12-17 10:10:20,597 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 184 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:20,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 393 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:10:20,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-12-17 10:10:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 109. [2021-12-17 10:10:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:10:21,029 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:10:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:21,030 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:10:21,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:10:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:10:21,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:10:21,030 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:10:21,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-12-17 10:10:21,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-12-17 10:10:21,240 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:10:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:10:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash 860799036, now seen corresponding path program 112 times [2021-12-17 10:10:21,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:10:21,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655190991] [2021-12-17 10:10:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:10:21,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:10:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 346 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:21,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:10:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655190991] [2021-12-17 10:10:21,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655190991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:10:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621762927] [2021-12-17 10:10:21,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:10:21,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:21,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:10:21,599 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:10:21,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-12-17 10:10:21,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:10:21,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:10:21,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:10:21,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:10:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:22,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:10:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:22,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621762927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:10:22,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:10:22,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 70 [2021-12-17 10:10:22,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845420307] [2021-12-17 10:10:22,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:10:22,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-17 10:10:22,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:10:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-17 10:10:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=4001, Unknown=0, NotChecked=0, Total=4830 [2021-12-17 10:10:22,616 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:27,912 INFO L93 Difference]: Finished difference Result 695 states and 722 transitions. [2021-12-17 10:10:27,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-17 10:10:27,912 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:10:27,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:27,912 INFO L225 Difference]: With dead ends: 695 [2021-12-17 10:10:27,913 INFO L226 Difference]: Without dead ends: 640 [2021-12-17 10:10:27,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11309 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5300, Invalid=25500, Unknown=0, NotChecked=0, Total=30800 [2021-12-17 10:10:27,914 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 301 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:27,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 388 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:10:27,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-12-17 10:10:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 109. [2021-12-17 10:10:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:10:28,371 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:10:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:28,371 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:10:28,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:10:28,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:10:28,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:10:28,372 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:10:28,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-12-17 10:10:28,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:28,572 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:10:28,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:10:28,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1149354461, now seen corresponding path program 113 times [2021-12-17 10:10:28,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:10:28,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363770156] [2021-12-17 10:10:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:10:28,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:10:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 346 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:28,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:10:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363770156] [2021-12-17 10:10:28,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363770156] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:10:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954458657] [2021-12-17 10:10:28,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:10:28,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:10:28,946 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:10:28,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-12-17 10:10:29,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-17 10:10:29,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:10:29,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:10:29,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:10:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 392 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:29,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:10:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 392 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:30,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954458657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:10:30,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:10:30,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 69 [2021-12-17 10:10:30,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772616322] [2021-12-17 10:10:30,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:10:30,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-17 10:10:30,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:10:30,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-17 10:10:30,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3887, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 10:10:30,021 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:35,480 INFO L93 Difference]: Finished difference Result 757 states and 785 transitions. [2021-12-17 10:10:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-17 10:10:35,480 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:10:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:35,481 INFO L225 Difference]: With dead ends: 757 [2021-12-17 10:10:35,481 INFO L226 Difference]: Without dead ends: 702 [2021-12-17 10:10:35,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11486 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5363, Invalid=25789, Unknown=0, NotChecked=0, Total=31152 [2021-12-17 10:10:35,482 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 269 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:35,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 393 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:10:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-17 10:10:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 109. [2021-12-17 10:10:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:10:35,901 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:10:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:35,901 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:10:35,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:10:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:10:35,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:10:35,902 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:10:35,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-12-17 10:10:36,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:36,102 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:10:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:10:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash 604473372, now seen corresponding path program 114 times [2021-12-17 10:10:36,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:10:36,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833298555] [2021-12-17 10:10:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:10:36,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:10:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 346 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:36,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:10:36,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833298555] [2021-12-17 10:10:36,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833298555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:10:36,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871191038] [2021-12-17 10:10:36,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:10:36,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:36,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:10:36,471 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:10:36,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-12-17 10:10:36,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-17 10:10:36,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:10:36,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:10:36,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:10:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:37,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:10:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:37,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871191038] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:10:37,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:10:37,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 68 [2021-12-17 10:10:37,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821590956] [2021-12-17 10:10:37,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:10:37,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-17 10:10:37,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:10:37,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-17 10:10:37,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=3771, Unknown=0, NotChecked=0, Total=4556 [2021-12-17 10:10:37,481 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:43,242 INFO L93 Difference]: Finished difference Result 818 states and 847 transitions. [2021-12-17 10:10:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-17 10:10:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:10:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:43,243 INFO L225 Difference]: With dead ends: 818 [2021-12-17 10:10:43,243 INFO L226 Difference]: Without dead ends: 763 [2021-12-17 10:10:43,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11378 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5298, Invalid=25502, Unknown=0, NotChecked=0, Total=30800 [2021-12-17 10:10:43,244 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 329 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:43,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 345 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:10:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-12-17 10:10:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 109. [2021-12-17 10:10:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:10:43,705 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:10:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:43,705 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:10:43,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:10:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:10:43,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:10:43,705 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:10:43,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-12-17 10:10:43,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-12-17 10:10:43,906 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:10:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:10:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1214218755, now seen corresponding path program 115 times [2021-12-17 10:10:43,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:10:43,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988467925] [2021-12-17 10:10:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:10:43,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:10:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 346 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:44,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:10:44,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988467925] [2021-12-17 10:10:44,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988467925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:10:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156104793] [2021-12-17 10:10:44,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:10:44,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:44,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:10:44,273 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:10:44,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-12-17 10:10:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:44,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:10:44,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:10:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:45,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:10:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:45,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156104793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:10:45,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:10:45,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 67 [2021-12-17 10:10:45,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425630571] [2021-12-17 10:10:45,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:10:45,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-17 10:10:45,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:10:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-17 10:10:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=3653, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 10:10:45,250 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:50,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:50,948 INFO L93 Difference]: Finished difference Result 878 states and 908 transitions. [2021-12-17 10:10:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-17 10:10:50,949 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:10:50,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:50,949 INFO L225 Difference]: With dead ends: 878 [2021-12-17 10:10:50,949 INFO L226 Difference]: Without dead ends: 823 [2021-12-17 10:10:50,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10982 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5108, Invalid=24648, Unknown=0, NotChecked=0, Total=29756 [2021-12-17 10:10:50,951 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 355 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:50,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 402 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:10:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-12-17 10:10:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 109. [2021-12-17 10:10:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:51,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:10:51,473 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:10:51,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:51,473 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:10:51,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:10:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:10:51,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:10:51,473 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:10:51,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-12-17 10:10:51,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:51,674 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:10:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:10:51,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1913702396, now seen corresponding path program 116 times [2021-12-17 10:10:51,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:10:51,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151743624] [2021-12-17 10:10:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:10:51,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:10:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:10:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 346 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:52,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:10:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151743624] [2021-12-17 10:10:52,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151743624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:10:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664048749] [2021-12-17 10:10:52,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:10:52,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:52,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:10:52,056 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:10:52,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-12-17 10:10:52,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:10:52,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:10:52,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:10:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:10:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:52,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:10:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:10:52,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664048749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:10:52,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:10:52,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 66 [2021-12-17 10:10:52,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836486100] [2021-12-17 10:10:52,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:10:52,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-17 10:10:52,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:10:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-17 10:10:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=3533, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 10:10:52,995 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:59,029 INFO L93 Difference]: Finished difference Result 937 states and 968 transitions. [2021-12-17 10:10:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-17 10:10:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:10:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:59,029 INFO L225 Difference]: With dead ends: 937 [2021-12-17 10:10:59,030 INFO L226 Difference]: Without dead ends: 882 [2021-12-17 10:10:59,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10306 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4802, Invalid=23254, Unknown=0, NotChecked=0, Total=28056 [2021-12-17 10:10:59,031 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 337 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:59,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 470 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:10:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-12-17 10:10:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 109. [2021-12-17 10:10:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:10:59,488 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:10:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:59,488 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:10:59,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:10:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:10:59,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:10:59,488 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:10:59,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-12-17 10:10:59,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:59,689 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:10:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:10:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash 629129757, now seen corresponding path program 117 times [2021-12-17 10:10:59,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:10:59,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063351246] [2021-12-17 10:10:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:10:59,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:10:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 346 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:00,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:00,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063351246] [2021-12-17 10:11:00,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063351246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:00,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198948187] [2021-12-17 10:11:00,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:11:00,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:00,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:00,082 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:00,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-12-17 10:11:00,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-17 10:11:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:11:00,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:11:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:00,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:01,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198948187] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:01,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:01,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 65 [2021-12-17 10:11:01,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891187960] [2021-12-17 10:11:01,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:01,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 10:11:01,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 10:11:01,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:11:01,110 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:11:07,588 INFO L93 Difference]: Finished difference Result 995 states and 1027 transitions. [2021-12-17 10:11:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-17 10:11:07,588 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:11:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:11:07,589 INFO L225 Difference]: With dead ends: 995 [2021-12-17 10:11:07,589 INFO L226 Difference]: Without dead ends: 940 [2021-12-17 10:11:07,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9370 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4395, Invalid=21365, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 10:11:07,590 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 370 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:11:07,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 423 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:11:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-12-17 10:11:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 109. [2021-12-17 10:11:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:11:08,018 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:11:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:11:08,018 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:11:08,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:11:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:11:08,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:11:08,018 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:11:08,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-12-17 10:11:08,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-12-17 10:11:08,219 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:11:08,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:11:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1490518052, now seen corresponding path program 118 times [2021-12-17 10:11:08,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:11:08,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319724902] [2021-12-17 10:11:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:11:08,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:11:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 346 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:08,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:08,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319724902] [2021-12-17 10:11:08,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319724902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:08,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149807805] [2021-12-17 10:11:08,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:11:08,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:08,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:08,583 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:08,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-12-17 10:11:08,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:11:08,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:11:08,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:11:08,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:09,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:09,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149807805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:09,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:09,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 64 [2021-12-17 10:11:09,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223048744] [2021-12-17 10:11:09,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:09,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-17 10:11:09,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-17 10:11:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=3287, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 10:11:09,509 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:11:15,906 INFO L93 Difference]: Finished difference Result 1052 states and 1085 transitions. [2021-12-17 10:11:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-17 10:11:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:11:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:11:15,907 INFO L225 Difference]: With dead ends: 1052 [2021-12-17 10:11:15,907 INFO L226 Difference]: Without dead ends: 997 [2021-12-17 10:11:15,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8206 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3908, Invalid=19044, Unknown=0, NotChecked=0, Total=22952 [2021-12-17 10:11:15,908 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 432 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:11:15,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 444 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:11:15,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-12-17 10:11:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 109. [2021-12-17 10:11:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:11:16,360 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:11:16,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:11:16,360 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:11:16,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:11:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:11:16,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:11:16,361 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:11:16,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-12-17 10:11:16,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:16,561 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:11:16,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:11:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash -727609795, now seen corresponding path program 119 times [2021-12-17 10:11:16,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:11:16,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764694863] [2021-12-17 10:11:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:11:16,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:11:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 346 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:16,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:16,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764694863] [2021-12-17 10:11:16,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764694863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:16,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62876792] [2021-12-17 10:11:16,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:11:16,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:16,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:16,937 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:16,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-12-17 10:11:16,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-17 10:11:16,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:11:16,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:11:16,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:17,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:17,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62876792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:17,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:17,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2021-12-17 10:11:17,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68016085] [2021-12-17 10:11:17,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:17,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-17 10:11:17,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-17 10:11:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=3161, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 10:11:17,836 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:23,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:11:23,980 INFO L93 Difference]: Finished difference Result 1108 states and 1142 transitions. [2021-12-17 10:11:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-17 10:11:23,980 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:11:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:11:23,981 INFO L225 Difference]: With dead ends: 1108 [2021-12-17 10:11:23,981 INFO L226 Difference]: Without dead ends: 1053 [2021-12-17 10:11:23,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6858 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3368, Invalid=16372, Unknown=0, NotChecked=0, Total=19740 [2021-12-17 10:11:23,982 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 425 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:11:23,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 404 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:11:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-12-17 10:11:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 109. [2021-12-17 10:11:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:11:24,438 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:11:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:11:24,438 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:11:24,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:11:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:11:24,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:11:24,439 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:11:24,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-12-17 10:11:24,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-12-17 10:11:24,647 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:11:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:11:24,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1534283844, now seen corresponding path program 120 times [2021-12-17 10:11:24,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:11:24,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222548633] [2021-12-17 10:11:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:11:24,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:11:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 346 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:25,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222548633] [2021-12-17 10:11:25,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222548633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040458273] [2021-12-17 10:11:25,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:11:25,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:25,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:25,027 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:25,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-12-17 10:11:25,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-17 10:11:25,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:11:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:11:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:25,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:25,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040458273] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:25,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:25,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 62 [2021-12-17 10:11:25,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429173900] [2021-12-17 10:11:25,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:25,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-17 10:11:25,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:25,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-17 10:11:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3033, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 10:11:25,923 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 62 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:11:32,185 INFO L93 Difference]: Finished difference Result 1163 states and 1198 transitions. [2021-12-17 10:11:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-17 10:11:32,185 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:11:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:11:32,186 INFO L225 Difference]: With dead ends: 1163 [2021-12-17 10:11:32,186 INFO L226 Difference]: Without dead ends: 1108 [2021-12-17 10:11:32,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5346 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2808, Invalid=13448, Unknown=0, NotChecked=0, Total=16256 [2021-12-17 10:11:32,187 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 832 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:11:32,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 374 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:11:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-12-17 10:11:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 109. [2021-12-17 10:11:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-12-17 10:11:32,618 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2021-12-17 10:11:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:11:32,618 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-12-17 10:11:32,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-12-17 10:11:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 10:11:32,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:11:32,619 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:11:32,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-12-17 10:11:32,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-12-17 10:11:32,819 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:11:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:11:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1006116259, now seen corresponding path program 16 times [2021-12-17 10:11:32,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:11:32,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108692786] [2021-12-17 10:11:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:11:32,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:11:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:33,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108692786] [2021-12-17 10:11:33,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108692786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215207589] [2021-12-17 10:11:33,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:11:33,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:33,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:33,188 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:33,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-12-17 10:11:33,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:11:33,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:11:33,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 10:11:33,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:33,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:34,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215207589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:34,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:34,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 61 [2021-12-17 10:11:34,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081655465] [2021-12-17 10:11:34,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:34,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 10:11:34,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 10:11:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2903, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 10:11:34,102 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:11:40,211 INFO L93 Difference]: Finished difference Result 1220 states and 1257 transitions. [2021-12-17 10:11:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 10:11:40,212 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-17 10:11:40,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:11:40,212 INFO L225 Difference]: With dead ends: 1220 [2021-12-17 10:11:40,212 INFO L226 Difference]: Without dead ends: 1165 [2021-12-17 10:11:40,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3816 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2285, Invalid=10371, Unknown=0, NotChecked=0, Total=12656 [2021-12-17 10:11:40,213 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 550 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:11:40,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 338 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:11:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-12-17 10:11:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 111. [2021-12-17 10:11:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 110 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2021-12-17 10:11:40,705 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 75 [2021-12-17 10:11:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:11:40,705 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2021-12-17 10:11:40,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2021-12-17 10:11:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 10:11:40,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:11:40,706 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:11:40,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-12-17 10:11:40,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:40,906 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:11:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:11:40,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1801237463, now seen corresponding path program 32 times [2021-12-17 10:11:40,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:11:40,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755601065] [2021-12-17 10:11:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:11:40,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:11:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:41,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:41,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755601065] [2021-12-17 10:11:41,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755601065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:41,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921715892] [2021-12-17 10:11:41,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:11:41,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:41,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:41,067 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:41,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-12-17 10:11:41,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:11:41,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:11:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 10:11:41,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:41,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:41,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921715892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:41,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:41,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2021-12-17 10:11:41,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117159445] [2021-12-17 10:11:41,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:41,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 10:11:41,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 10:11:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-12-17 10:11:41,333 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:42,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:11:42,054 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2021-12-17 10:11:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 10:11:42,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 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 76 [2021-12-17 10:11:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:11:42,055 INFO L225 Difference]: With dead ends: 122 [2021-12-17 10:11:42,055 INFO L226 Difference]: Without dead ends: 120 [2021-12-17 10:11:42,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 10:11:42,055 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 112 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:11:42,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 242 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:11:42,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-17 10:11:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2021-12-17 10:11:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.176991150442478) internal successors, (133), 113 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2021-12-17 10:11:42,513 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 76 [2021-12-17 10:11:42,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:11:42,513 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2021-12-17 10:11:42,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:42,513 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2021-12-17 10:11:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:11:42,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:11:42,513 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:11:42,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-12-17 10:11:42,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-12-17 10:11:42,714 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:11:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:11:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash -651292871, now seen corresponding path program 33 times [2021-12-17 10:11:42,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:11:42,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867521578] [2021-12-17 10:11:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:11:42,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:11:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:43,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:43,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867521578] [2021-12-17 10:11:43,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867521578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:43,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377809719] [2021-12-17 10:11:43,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:11:43,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:43,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:43,132 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:43,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-12-17 10:11:43,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-17 10:11:43,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:11:43,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:11:43,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:44,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:44,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377809719] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:44,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:44,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2021-12-17 10:11:44,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696389909] [2021-12-17 10:11:44,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:44,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-17 10:11:44,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-17 10:11:44,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=5253, Unknown=0, NotChecked=0, Total=6480 [2021-12-17 10:11:44,436 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:11:46,351 INFO L93 Difference]: Finished difference Result 246 states and 267 transitions. [2021-12-17 10:11:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 10:11:46,351 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 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 79 [2021-12-17 10:11:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:11:46,351 INFO L225 Difference]: With dead ends: 246 [2021-12-17 10:11:46,351 INFO L226 Difference]: Without dead ends: 188 [2021-12-17 10:11:46,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4762 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2542, Invalid=11500, Unknown=0, NotChecked=0, Total=14042 [2021-12-17 10:11:46,352 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:11:46,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 301 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:11:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-17 10:11:46,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-12-17 10:11:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:11:46,901 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:11:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:11:46,901 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:11:46,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:11:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:11:46,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:11:46,902 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:11:46,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-12-17 10:11:47,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:47,102 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:11:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:11:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1569100040, now seen corresponding path program 121 times [2021-12-17 10:11:47,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:11:47,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739396724] [2021-12-17 10:11:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:11:47,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:11:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 393 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:47,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:47,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739396724] [2021-12-17 10:11:47,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739396724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:47,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149772369] [2021-12-17 10:11:47,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:11:47,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:47,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:47,540 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:47,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-12-17 10:11:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:47,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:11:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 442 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:48,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 442 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:48,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149772369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:48,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:48,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 80 [2021-12-17 10:11:48,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326204279] [2021-12-17 10:11:48,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:48,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-17 10:11:48,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:48,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-17 10:11:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1172, Invalid=5148, Unknown=0, NotChecked=0, Total=6320 [2021-12-17 10:11:48,784 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 80 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:11:51,327 INFO L93 Difference]: Finished difference Result 319 states and 341 transitions. [2021-12-17 10:11:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-17 10:11:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 80 states have internal predecessors, (160), 0 states have call successors, (0), 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 79 [2021-12-17 10:11:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:11:51,327 INFO L225 Difference]: With dead ends: 319 [2021-12-17 10:11:51,327 INFO L226 Difference]: Without dead ends: 261 [2021-12-17 10:11:51,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6214 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3130, Invalid=14960, Unknown=0, NotChecked=0, Total=18090 [2021-12-17 10:11:51,328 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 63 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:11:51,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 480 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:11:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-17 10:11:51,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 115. [2021-12-17 10:11:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:11:51,850 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:11:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:11:51,851 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:11:51,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 80 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:11:51,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:11:51,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:11:51,851 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:11:51,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-12-17 10:11:52,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-12-17 10:11:52,052 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:11:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:11:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1737254055, now seen corresponding path program 122 times [2021-12-17 10:11:52,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:11:52,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496514180] [2021-12-17 10:11:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:11:52,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:11:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 393 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:52,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:52,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496514180] [2021-12-17 10:11:52,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496514180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:52,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536632866] [2021-12-17 10:11:52,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:11:52,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:52,471 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:52,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-12-17 10:11:52,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:11:52,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:11:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:11:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 442 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:53,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 442 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:53,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536632866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:53,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:53,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 79 [2021-12-17 10:11:53,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489029754] [2021-12-17 10:11:53,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:53,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-17 10:11:53,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:53,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-17 10:11:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=5041, Unknown=0, NotChecked=0, Total=6162 [2021-12-17 10:11:53,651 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:11:57,077 INFO L93 Difference]: Finished difference Result 391 states and 414 transitions. [2021-12-17 10:11:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-17 10:11:57,077 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 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 79 [2021-12-17 10:11:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:11:57,078 INFO L225 Difference]: With dead ends: 391 [2021-12-17 10:11:57,078 INFO L226 Difference]: Without dead ends: 333 [2021-12-17 10:11:57,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7710 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3766, Invalid=18286, Unknown=0, NotChecked=0, Total=22052 [2021-12-17 10:11:57,079 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:11:57,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 403 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:11:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-17 10:11:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 115. [2021-12-17 10:11:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:11:57,593 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:11:57,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:11:57,593 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:11:57,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:11:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:11:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:11:57,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:11:57,594 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:11:57,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2021-12-17 10:11:57,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:57,794 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:11:57,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:11:57,794 INFO L85 PathProgramCache]: Analyzing trace with hash 474078936, now seen corresponding path program 123 times [2021-12-17 10:11:57,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:11:57,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247940691] [2021-12-17 10:11:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:11:57,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:11:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:11:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 393 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:58,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:11:58,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247940691] [2021-12-17 10:11:58,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247940691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:11:58,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431040146] [2021-12-17 10:11:58,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:11:58,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:11:58,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:11:58,194 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:11:58,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-12-17 10:11:58,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-17 10:11:58,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:11:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:11:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:11:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 442 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:59,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:11:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 442 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:11:59,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431040146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:11:59,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:11:59,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 78 [2021-12-17 10:11:59,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658465975] [2021-12-17 10:11:59,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:11:59,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-17 10:11:59,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:11:59,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-17 10:11:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1074, Invalid=4932, Unknown=0, NotChecked=0, Total=6006 [2021-12-17 10:11:59,408 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:03,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:12:03,627 INFO L93 Difference]: Finished difference Result 462 states and 486 transitions. [2021-12-17 10:12:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-17 10:12:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 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 79 [2021-12-17 10:12:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:12:03,628 INFO L225 Difference]: With dead ends: 462 [2021-12-17 10:12:03,628 INFO L226 Difference]: Without dead ends: 404 [2021-12-17 10:12:03,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9144 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4389, Invalid=21371, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 10:12:03,629 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 150 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:12:03,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 347 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:12:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-12-17 10:12:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 115. [2021-12-17 10:12:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:12:04,231 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:12:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:12:04,231 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:12:04,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:12:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:12:04,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:12:04,232 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:12:04,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-12-17 10:12:04,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:04,432 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:12:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:12:04,432 INFO L85 PathProgramCache]: Analyzing trace with hash -840061063, now seen corresponding path program 124 times [2021-12-17 10:12:04,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:12:04,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349276330] [2021-12-17 10:12:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:12:04,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:12:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:12:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 393 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:04,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:12:04,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349276330] [2021-12-17 10:12:04,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349276330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:12:04,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139827174] [2021-12-17 10:12:04,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:12:04,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:12:04,832 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:12:04,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-12-17 10:12:04,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:12:04,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:12:04,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:12:04,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:12:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 442 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:05,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:12:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 442 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:05,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139827174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:12:05,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:12:05,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 77 [2021-12-17 10:12:05,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992492381] [2021-12-17 10:12:05,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:12:05,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-17 10:12:05,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:12:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-17 10:12:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=4821, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 10:12:05,996 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:12:10,808 INFO L93 Difference]: Finished difference Result 532 states and 557 transitions. [2021-12-17 10:12:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-17 10:12:10,809 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 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 79 [2021-12-17 10:12:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:12:10,809 INFO L225 Difference]: With dead ends: 532 [2021-12-17 10:12:10,809 INFO L226 Difference]: Without dead ends: 474 [2021-12-17 10:12:10,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10461 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4963, Invalid=24107, Unknown=0, NotChecked=0, Total=29070 [2021-12-17 10:12:10,810 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 166 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:12:10,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 339 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:12:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-17 10:12:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 115. [2021-12-17 10:12:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:12:11,445 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:12:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:12:11,445 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:12:11,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:12:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:12:11,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:12:11,445 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:12:11,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-12-17 10:12:11,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-12-17 10:12:11,646 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:12:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:12:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1021000008, now seen corresponding path program 125 times [2021-12-17 10:12:11,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:12:11,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690985933] [2021-12-17 10:12:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:12:11,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:12:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:12:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 393 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:12,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:12:12,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690985933] [2021-12-17 10:12:12,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690985933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:12:12,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328156486] [2021-12-17 10:12:12,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:12:12,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:12,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:12:12,062 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:12:12,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-12-17 10:12:12,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-17 10:12:12,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:12:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:12:12,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:12:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 442 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:13,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:12:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 442 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:13,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328156486] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:12:13,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:12:13,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 76 [2021-12-17 10:12:13,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773875657] [2021-12-17 10:12:13,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:12:13,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-17 10:12:13,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:12:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-17 10:12:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=4708, Unknown=0, NotChecked=0, Total=5700 [2021-12-17 10:12:13,253 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 76 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:12:19,140 INFO L93 Difference]: Finished difference Result 601 states and 627 transitions. [2021-12-17 10:12:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-17 10:12:19,141 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 76 states have internal predecessors, (156), 0 states have call successors, (0), 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 79 [2021-12-17 10:12:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:12:19,141 INFO L225 Difference]: With dead ends: 601 [2021-12-17 10:12:19,141 INFO L226 Difference]: Without dead ends: 543 [2021-12-17 10:12:19,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11599 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5458, Invalid=26404, Unknown=0, NotChecked=0, Total=31862 [2021-12-17 10:12:19,142 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 159 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:12:19,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 356 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:12:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-12-17 10:12:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 115. [2021-12-17 10:12:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:12:19,682 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:12:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:12:19,682 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:12:19,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 76 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:12:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:12:19,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:12:19,682 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:12:19,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2021-12-17 10:12:19,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:19,883 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:12:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:12:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash 220089241, now seen corresponding path program 126 times [2021-12-17 10:12:19,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:12:19,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432397109] [2021-12-17 10:12:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:12:19,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:12:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:12:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 393 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:20,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:12:20,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432397109] [2021-12-17 10:12:20,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432397109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:12:20,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320618970] [2021-12-17 10:12:20,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:12:20,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:20,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:12:20,277 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:12:20,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-12-17 10:12:20,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-17 10:12:20,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:12:20,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:12:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:12:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 442 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:21,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:12:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 442 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:21,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320618970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:12:21,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:12:21,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 75 [2021-12-17 10:12:21,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986317491] [2021-12-17 10:12:21,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:12:21,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-17 10:12:21,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:12:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-17 10:12:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=4593, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 10:12:21,411 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:12:27,360 INFO L93 Difference]: Finished difference Result 669 states and 696 transitions. [2021-12-17 10:12:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-17 10:12:27,360 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 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 79 [2021-12-17 10:12:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:12:27,361 INFO L225 Difference]: With dead ends: 669 [2021-12-17 10:12:27,361 INFO L226 Difference]: Without dead ends: 611 [2021-12-17 10:12:27,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12508 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5850, Invalid=28190, Unknown=0, NotChecked=0, Total=34040 [2021-12-17 10:12:27,362 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 195 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:12:27,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 382 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:12:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-12-17 10:12:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 115. [2021-12-17 10:12:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:12:27,938 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:12:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:12:27,938 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:12:27,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:12:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:12:27,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:12:27,939 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:12:27,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-12-17 10:12:28,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:28,139 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:12:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:12:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1956632936, now seen corresponding path program 127 times [2021-12-17 10:12:28,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:12:28,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057275611] [2021-12-17 10:12:28,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:12:28,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:12:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:12:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 393 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:28,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:12:28,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057275611] [2021-12-17 10:12:28,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057275611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:12:28,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042193870] [2021-12-17 10:12:28,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:12:28,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:28,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:12:28,550 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:12:28,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-12-17 10:12:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:12:28,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:12:28,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:12:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 442 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:29,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:12:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 442 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:29,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042193870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:12:29,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:12:29,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 74 [2021-12-17 10:12:29,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008672060] [2021-12-17 10:12:29,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:12:29,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-17 10:12:29,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:12:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-17 10:12:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=4476, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 10:12:29,670 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:12:36,421 INFO L93 Difference]: Finished difference Result 736 states and 764 transitions. [2021-12-17 10:12:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-17 10:12:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 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 79 [2021-12-17 10:12:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:12:36,422 INFO L225 Difference]: With dead ends: 736 [2021-12-17 10:12:36,422 INFO L226 Difference]: Without dead ends: 678 [2021-12-17 10:12:36,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13150 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6121, Invalid=29411, Unknown=0, NotChecked=0, Total=35532 [2021-12-17 10:12:36,423 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 223 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:12:36,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 415 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:12:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-17 10:12:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 115. [2021-12-17 10:12:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:12:37,073 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:12:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:12:37,073 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:12:37,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:12:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:12:37,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:12:37,074 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:12:37,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2021-12-17 10:12:37,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:37,274 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:12:37,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:12:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash -502829127, now seen corresponding path program 128 times [2021-12-17 10:12:37,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:12:37,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658159114] [2021-12-17 10:12:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:12:37,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:12:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:12:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 393 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:37,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:12:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658159114] [2021-12-17 10:12:37,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658159114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:12:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995867614] [2021-12-17 10:12:37,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:12:37,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:37,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:12:37,700 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:12:37,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-12-17 10:12:37,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:12:37,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:12:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:12:37,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:12:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 442 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:38,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:12:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 442 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:38,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995867614] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:12:38,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:12:38,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 73 [2021-12-17 10:12:38,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014564593] [2021-12-17 10:12:38,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:12:38,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-17 10:12:38,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:12:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-17 10:12:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=4357, Unknown=0, NotChecked=0, Total=5256 [2021-12-17 10:12:38,856 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:12:46,404 INFO L93 Difference]: Finished difference Result 802 states and 831 transitions. [2021-12-17 10:12:46,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-17 10:12:46,404 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 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 79 [2021-12-17 10:12:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:12:46,405 INFO L225 Difference]: With dead ends: 802 [2021-12-17 10:12:46,405 INFO L226 Difference]: Without dead ends: 744 [2021-12-17 10:12:46,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13499 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6259, Invalid=30031, Unknown=0, NotChecked=0, Total=36290 [2021-12-17 10:12:46,406 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 385 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:12:46,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 400 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:12:46,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-17 10:12:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 115. [2021-12-17 10:12:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:12:46,981 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:12:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:12:46,981 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:12:46,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:12:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:12:46,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:12:46,981 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:12:46,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2021-12-17 10:12:47,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-12-17 10:12:47,182 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:12:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:12:47,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1622277752, now seen corresponding path program 129 times [2021-12-17 10:12:47,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:12:47,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135284409] [2021-12-17 10:12:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:12:47,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:12:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:12:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 393 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:47,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:12:47,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135284409] [2021-12-17 10:12:47,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135284409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:12:47,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363856908] [2021-12-17 10:12:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:12:47,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:12:47,568 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:12:47,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-12-17 10:12:47,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-17 10:12:47,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:12:47,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:12:47,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:12:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 442 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:48,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:12:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 442 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:48,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363856908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:12:48,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:12:48,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 72 [2021-12-17 10:12:48,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819990926] [2021-12-17 10:12:48,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:12:48,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-17 10:12:48,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:12:48,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-17 10:12:48,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=4236, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 10:12:48,659 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:12:56,359 INFO L93 Difference]: Finished difference Result 867 states and 897 transitions. [2021-12-17 10:12:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-17 10:12:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 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 79 [2021-12-17 10:12:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:12:56,360 INFO L225 Difference]: With dead ends: 867 [2021-12-17 10:12:56,360 INFO L226 Difference]: Without dead ends: 809 [2021-12-17 10:12:56,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13541 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6258, Invalid=30032, Unknown=0, NotChecked=0, Total=36290 [2021-12-17 10:12:56,362 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 300 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:12:56,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 514 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:12:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-12-17 10:12:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 115. [2021-12-17 10:12:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:12:56,944 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:12:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:12:56,944 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:12:56,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:12:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:12:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:12:56,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:12:56,944 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:12:56,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-12-17 10:12:57,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-12-17 10:12:57,150 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:12:57,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:12:57,150 INFO L85 PathProgramCache]: Analyzing trace with hash -248833063, now seen corresponding path program 130 times [2021-12-17 10:12:57,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:12:57,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870744219] [2021-12-17 10:12:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:12:57,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:12:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:12:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 393 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:57,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:12:57,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870744219] [2021-12-17 10:12:57,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870744219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:12:57,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483126777] [2021-12-17 10:12:57,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:12:57,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:12:57,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:12:57,542 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:12:57,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-12-17 10:12:57,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:12:57,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:12:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:12:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:12:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 442 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:58,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:12:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 442 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:12:58,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483126777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:12:58,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:12:58,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 71 [2021-12-17 10:12:58,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860044889] [2021-12-17 10:12:58,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:12:58,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-17 10:12:58,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:12:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-17 10:12:58,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=4113, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 10:12:58,621 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 71 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:06,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:13:06,380 INFO L93 Difference]: Finished difference Result 931 states and 962 transitions. [2021-12-17 10:13:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-17 10:13:06,381 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 71 states have internal predecessors, (151), 0 states have call successors, (0), 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 79 [2021-12-17 10:13:06,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:13:06,381 INFO L225 Difference]: With dead ends: 931 [2021-12-17 10:13:06,381 INFO L226 Difference]: Without dead ends: 873 [2021-12-17 10:13:06,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13270 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6118, Invalid=29414, Unknown=0, NotChecked=0, Total=35532 [2021-12-17 10:13:06,382 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 284 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:13:06,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 519 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:13:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-12-17 10:13:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 115. [2021-12-17 10:13:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:13:06,945 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:13:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:13:06,946 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:13:06,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 71 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:13:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:13:06,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:13:06,946 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:13:06,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-12-17 10:13:07,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:07,146 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:13:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:13:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash 106450520, now seen corresponding path program 131 times [2021-12-17 10:13:07,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:13:07,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343394096] [2021-12-17 10:13:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:13:07,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:13:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:13:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 393 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:07,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:13:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343394096] [2021-12-17 10:13:07,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343394096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:13:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663743580] [2021-12-17 10:13:07,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:13:07,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:07,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:13:07,534 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:13:07,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-12-17 10:13:07,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-17 10:13:07,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:13:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:13:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:13:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 442 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:08,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:13:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 442 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:08,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663743580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:13:08,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:13:08,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 70 [2021-12-17 10:13:08,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74770750] [2021-12-17 10:13:08,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:13:08,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-17 10:13:08,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:13:08,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-17 10:13:08,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=3988, Unknown=0, NotChecked=0, Total=4830 [2021-12-17 10:13:08,574 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 70 states, 70 states have (on average 2.142857142857143) internal successors, (150), 70 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:13:16,491 INFO L93 Difference]: Finished difference Result 994 states and 1026 transitions. [2021-12-17 10:13:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-17 10:13:16,491 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.142857142857143) internal successors, (150), 70 states have internal predecessors, (150), 0 states have call successors, (0), 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 79 [2021-12-17 10:13:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:13:16,492 INFO L225 Difference]: With dead ends: 994 [2021-12-17 10:13:16,492 INFO L226 Difference]: Without dead ends: 936 [2021-12-17 10:13:16,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12688 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5845, Invalid=28195, Unknown=0, NotChecked=0, Total=34040 [2021-12-17 10:13:16,493 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 543 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:13:16,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 511 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:13:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-12-17 10:13:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 115. [2021-12-17 10:13:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:13:17,138 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:13:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:13:17,138 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:13:17,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.142857142857143) internal successors, (150), 70 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:13:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:13:17,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:13:17,139 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:13:17,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-12-17 10:13:17,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-12-17 10:13:17,339 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:13:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:13:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash 395005945, now seen corresponding path program 132 times [2021-12-17 10:13:17,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:13:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664057610] [2021-12-17 10:13:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:13:17,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:13:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:13:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 393 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:17,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:13:17,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664057610] [2021-12-17 10:13:17,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664057610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:13:17,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119170986] [2021-12-17 10:13:17,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:13:17,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:13:17,742 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:13:17,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-12-17 10:13:17,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-17 10:13:17,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:13:17,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:13:17,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:13:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 442 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:18,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:13:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 442 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:18,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119170986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:13:18,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:13:18,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 69 [2021-12-17 10:13:18,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528267511] [2021-12-17 10:13:18,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:13:18,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-17 10:13:18,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:13:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-17 10:13:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=3861, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 10:13:18,797 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 69 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:13:26,663 INFO L93 Difference]: Finished difference Result 1056 states and 1089 transitions. [2021-12-17 10:13:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-17 10:13:26,663 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 69 states have internal predecessors, (149), 0 states have call successors, (0), 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 79 [2021-12-17 10:13:26,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:13:26,664 INFO L225 Difference]: With dead ends: 1056 [2021-12-17 10:13:26,664 INFO L226 Difference]: Without dead ends: 998 [2021-12-17 10:13:26,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11809 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5451, Invalid=26411, Unknown=0, NotChecked=0, Total=31862 [2021-12-17 10:13:26,665 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 352 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:13:26,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 452 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:13:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-17 10:13:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 115. [2021-12-17 10:13:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:13:27,251 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:13:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:13:27,252 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:13:27,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 69 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:13:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:13:27,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:13:27,252 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:13:27,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-12-17 10:13:27,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:27,452 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:13:27,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:13:27,453 INFO L85 PathProgramCache]: Analyzing trace with hash -149875144, now seen corresponding path program 133 times [2021-12-17 10:13:27,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:13:27,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491794128] [2021-12-17 10:13:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:13:27,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:13:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:13:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 393 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:27,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:13:27,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491794128] [2021-12-17 10:13:27,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491794128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:13:27,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895353308] [2021-12-17 10:13:27,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:13:27,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:27,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:13:27,857 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:13:27,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-12-17 10:13:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:13:27,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:13:27,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:13:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 442 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:28,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:13:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 442 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:28,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895353308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:13:28,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:13:28,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 68 [2021-12-17 10:13:28,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913588491] [2021-12-17 10:13:28,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:13:28,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-17 10:13:28,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:13:28,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-17 10:13:28,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=3732, Unknown=0, NotChecked=0, Total=4556 [2021-12-17 10:13:28,883 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 68 states, 68 states have (on average 2.176470588235294) internal successors, (148), 68 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:13:37,102 INFO L93 Difference]: Finished difference Result 1117 states and 1151 transitions. [2021-12-17 10:13:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-17 10:13:37,102 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.176470588235294) internal successors, (148), 68 states have internal predecessors, (148), 0 states have call successors, (0), 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 79 [2021-12-17 10:13:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:13:37,103 INFO L225 Difference]: With dead ends: 1117 [2021-12-17 10:13:37,103 INFO L226 Difference]: Without dead ends: 1059 [2021-12-17 10:13:37,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10659 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4954, Invalid=24116, Unknown=0, NotChecked=0, Total=29070 [2021-12-17 10:13:37,105 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 431 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:13:37,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 467 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:13:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-12-17 10:13:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 115. [2021-12-17 10:13:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:13:37,766 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:13:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:13:37,766 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:13:37,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.176470588235294) internal successors, (148), 68 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:37,767 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:13:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:13:37,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:13:37,767 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:13:37,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2021-12-17 10:13:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:37,968 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:13:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:13:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1968567271, now seen corresponding path program 134 times [2021-12-17 10:13:37,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:13:37,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6796709] [2021-12-17 10:13:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:13:37,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:13:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:13:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 393 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:38,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:13:38,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6796709] [2021-12-17 10:13:38,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6796709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:13:38,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673216052] [2021-12-17 10:13:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:13:38,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:38,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:13:38,362 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:13:38,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-12-17 10:13:38,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:13:38,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:13:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:13:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:13:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 442 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:39,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:13:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 442 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:39,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673216052] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:13:39,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:13:39,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 67 [2021-12-17 10:13:39,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801657564] [2021-12-17 10:13:39,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:13:39,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-17 10:13:39,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:13:39,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-17 10:13:39,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3601, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 10:13:39,360 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:13:47,578 INFO L93 Difference]: Finished difference Result 1177 states and 1212 transitions. [2021-12-17 10:13:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-17 10:13:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 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 79 [2021-12-17 10:13:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:13:47,579 INFO L225 Difference]: With dead ends: 1177 [2021-12-17 10:13:47,579 INFO L226 Difference]: Without dead ends: 1119 [2021-12-17 10:13:47,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9276 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4378, Invalid=21382, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 10:13:47,580 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 604 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:13:47,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 422 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:13:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-12-17 10:13:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 115. [2021-12-17 10:13:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:13:48,184 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:13:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:13:48,184 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:13:48,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:13:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:13:48,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:13:48,184 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:13:48,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-12-17 10:13:48,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:48,385 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:13:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:13:48,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1159353880, now seen corresponding path program 135 times [2021-12-17 10:13:48,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:13:48,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483148665] [2021-12-17 10:13:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:13:48,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:13:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:13:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 393 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:48,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:13:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483148665] [2021-12-17 10:13:48,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483148665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:13:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514040889] [2021-12-17 10:13:48,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:13:48,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:48,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:13:48,776 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:13:48,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-12-17 10:13:48,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-17 10:13:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:13:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:13:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:13:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 442 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:49,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:13:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 442 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:49,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514040889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:13:49,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:13:49,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 66 [2021-12-17 10:13:49,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589176274] [2021-12-17 10:13:49,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:13:49,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-17 10:13:49,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:13:49,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-17 10:13:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=3468, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 10:13:49,765 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 66 states, 66 states have (on average 2.212121212121212) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:13:58,078 INFO L93 Difference]: Finished difference Result 1236 states and 1272 transitions. [2021-12-17 10:13:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-17 10:13:58,078 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.212121212121212) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 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 79 [2021-12-17 10:13:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:13:58,079 INFO L225 Difference]: With dead ends: 1236 [2021-12-17 10:13:58,079 INFO L226 Difference]: Without dead ends: 1178 [2021-12-17 10:13:58,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7710 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3753, Invalid=18299, Unknown=0, NotChecked=0, Total=22052 [2021-12-17 10:13:58,080 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 544 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:13:58,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 384 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:13:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-12-17 10:13:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 115. [2021-12-17 10:13:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:13:58,736 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:13:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:13:58,736 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:13:58,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.212121212121212) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:13:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:13:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:13:58,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:13:58,737 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:13:58,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-12-17 10:13:58,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:58,937 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:13:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:13:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash -125218759, now seen corresponding path program 136 times [2021-12-17 10:13:58,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:13:58,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85938352] [2021-12-17 10:13:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:13:58,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:13:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:13:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 393 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:13:59,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:13:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85938352] [2021-12-17 10:13:59,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85938352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:13:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372097528] [2021-12-17 10:13:59,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:13:59,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:13:59,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:13:59,345 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:13:59,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-12-17 10:13:59,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:13:59,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:13:59,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:13:59,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:14:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 442 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:00,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:14:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 442 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:00,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372097528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:14:00,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:14:00,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2021-12-17 10:14:00,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877993198] [2021-12-17 10:14:00,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:14:00,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 10:14:00,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:14:00,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 10:14:00,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=3333, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 10:14:00,319 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 65 states, 65 states have (on average 2.230769230769231) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:14:09,238 INFO L93 Difference]: Finished difference Result 1294 states and 1331 transitions. [2021-12-17 10:14:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-17 10:14:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.230769230769231) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 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 79 [2021-12-17 10:14:09,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:14:09,239 INFO L225 Difference]: With dead ends: 1294 [2021-12-17 10:14:09,239 INFO L226 Difference]: Without dead ends: 1236 [2021-12-17 10:14:09,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3115, Invalid=14975, Unknown=0, NotChecked=0, Total=18090 [2021-12-17 10:14:09,240 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 580 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:14:09,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 459 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:14:09,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-12-17 10:14:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 115. [2021-12-17 10:14:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-12-17 10:14:09,890 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2021-12-17 10:14:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:14:09,890 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-12-17 10:14:09,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.230769230769231) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-12-17 10:14:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 10:14:09,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:14:09,890 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:14:09,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2021-12-17 10:14:10,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:10,091 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:14:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:14:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2050100728, now seen corresponding path program 17 times [2021-12-17 10:14:10,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:14:10,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560557793] [2021-12-17 10:14:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:14:10,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:14:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:14:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:10,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:14:10,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560557793] [2021-12-17 10:14:10,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560557793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:14:10,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486893618] [2021-12-17 10:14:10,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:14:10,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:10,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:14:10,510 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:14:10,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-12-17 10:14:10,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-17 10:14:10,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:14:10,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 10:14:10,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:14:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:11,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:14:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:11,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486893618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:14:11,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:14:11,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 64 [2021-12-17 10:14:11,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940316429] [2021-12-17 10:14:11,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:14:11,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-17 10:14:11,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:14:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-17 10:14:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=3196, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 10:14:11,487 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 64 states, 64 states have (on average 2.25) internal successors, (144), 64 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:14:20,157 INFO L93 Difference]: Finished difference Result 1354 states and 1393 transitions. [2021-12-17 10:14:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-17 10:14:20,157 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.25) internal successors, (144), 64 states have internal predecessors, (144), 0 states have call successors, (0), 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 79 [2021-12-17 10:14:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:14:20,158 INFO L225 Difference]: With dead ends: 1354 [2021-12-17 10:14:20,158 INFO L226 Difference]: Without dead ends: 1296 [2021-12-17 10:14:20,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2525, Invalid=11517, Unknown=0, NotChecked=0, Total=14042 [2021-12-17 10:14:20,159 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 610 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:14:20,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 321 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:14:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-12-17 10:14:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 117. [2021-12-17 10:14:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 116 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2021-12-17 10:14:20,759 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 79 [2021-12-17 10:14:20,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:14:20,759 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2021-12-17 10:14:20,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.25) internal successors, (144), 64 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2021-12-17 10:14:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 10:14:20,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:14:20,760 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:14:20,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-12-17 10:14:20,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-12-17 10:14:20,960 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:14:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:14:20,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1573180595, now seen corresponding path program 34 times [2021-12-17 10:14:20,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:14:20,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745639410] [2021-12-17 10:14:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:14:20,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:14:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:14:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:21,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:14:21,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745639410] [2021-12-17 10:14:21,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745639410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:14:21,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268195908] [2021-12-17 10:14:21,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:14:21,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:21,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:14:21,124 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:14:21,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-12-17 10:14:21,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:14:21,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:14:21,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 10:14:21,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:14:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:21,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:14:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:21,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268195908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:14:21,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:14:21,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2021-12-17 10:14:21,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830067319] [2021-12-17 10:14:21,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:14:21,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 10:14:21,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:14:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 10:14:21,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2021-12-17 10:14:21,402 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:14:22,329 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-12-17 10:14:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 10:14:22,329 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-17 10:14:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:14:22,330 INFO L225 Difference]: With dead ends: 128 [2021-12-17 10:14:22,330 INFO L226 Difference]: Without dead ends: 126 [2021-12-17 10:14:22,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 10:14:22,330 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 103 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:14:22,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 223 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:14:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-17 10:14:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2021-12-17 10:14:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 119 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2021-12-17 10:14:22,943 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 80 [2021-12-17 10:14:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:14:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2021-12-17 10:14:22,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2021-12-17 10:14:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:14:22,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:14:22,943 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:14:22,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-12-17 10:14:23,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-12-17 10:14:23,144 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:14:23,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:14:23,144 INFO L85 PathProgramCache]: Analyzing trace with hash -55185187, now seen corresponding path program 35 times [2021-12-17 10:14:23,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:14:23,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918446108] [2021-12-17 10:14:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:14:23,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:14:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:14:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:23,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:14:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918446108] [2021-12-17 10:14:23,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918446108] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:14:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072904872] [2021-12-17 10:14:23,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:14:23,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:23,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:14:23,600 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:14:23,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-12-17 10:14:23,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-17 10:14:23,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:14:23,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:14:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:14:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:24,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:14:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:24,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072904872] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:14:24,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:14:24,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 85 [2021-12-17 10:14:24,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371990821] [2021-12-17 10:14:24,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:14:24,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-17 10:14:24,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:14:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-17 10:14:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1351, Invalid=5789, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 10:14:24,963 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:14:27,311 INFO L93 Difference]: Finished difference Result 259 states and 281 transitions. [2021-12-17 10:14:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 10:14:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 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 83 [2021-12-17 10:14:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:14:27,312 INFO L225 Difference]: With dead ends: 259 [2021-12-17 10:14:27,312 INFO L226 Difference]: Without dead ends: 198 [2021-12-17 10:14:27,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5284 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2795, Invalid=12705, Unknown=0, NotChecked=0, Total=15500 [2021-12-17 10:14:27,313 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 53 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:14:27,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 263 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:14:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-17 10:14:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 121. [2021-12-17 10:14:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:27,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:14:27,969 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:14:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:14:27,969 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:14:27,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:14:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:14:27,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:14:27,969 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:14:27,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-12-17 10:14:28,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-12-17 10:14:28,170 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:14:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:14:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1841125660, now seen corresponding path program 137 times [2021-12-17 10:14:28,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:14:28,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779021454] [2021-12-17 10:14:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:14:28,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:14:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:14:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 443 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:28,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:14:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779021454] [2021-12-17 10:14:28,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779021454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:14:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446126799] [2021-12-17 10:14:28,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:14:28,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:14:28,631 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:14:28,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-12-17 10:14:28,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-17 10:14:28,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:14:28,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:14:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:14:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 495 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:29,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:14:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 495 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:30,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446126799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:14:30,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:14:30,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 84 [2021-12-17 10:14:30,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838725397] [2021-12-17 10:14:30,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:14:30,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-17 10:14:30,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:14:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-17 10:14:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=5679, Unknown=0, NotChecked=0, Total=6972 [2021-12-17 10:14:30,049 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 84 states, 84 states have (on average 2.0) internal successors, (168), 84 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:14:33,312 INFO L93 Difference]: Finished difference Result 336 states and 359 transitions. [2021-12-17 10:14:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 10:14:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 84 states have internal predecessors, (168), 0 states have call successors, (0), 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 83 [2021-12-17 10:14:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:14:33,313 INFO L225 Difference]: With dead ends: 336 [2021-12-17 10:14:33,313 INFO L226 Difference]: Without dead ends: 275 [2021-12-17 10:14:33,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6912 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3454, Invalid=16568, Unknown=0, NotChecked=0, Total=20022 [2021-12-17 10:14:33,313 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 78 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:14:33,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 456 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:14:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-17 10:14:34,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 121. [2021-12-17 10:14:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:14:34,031 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:14:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:14:34,031 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:14:34,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 84 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:34,031 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:14:34,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:14:34,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:14:34,031 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:14:34,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-12-17 10:14:34,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:34,239 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:14:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:14:34,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1209560317, now seen corresponding path program 138 times [2021-12-17 10:14:34,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:14:34,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7186259] [2021-12-17 10:14:34,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:14:34,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:14:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:14:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 443 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:34,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:14:34,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7186259] [2021-12-17 10:14:34,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7186259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:14:34,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506715335] [2021-12-17 10:14:34,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:14:34,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:34,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:14:34,691 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:14:34,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-12-17 10:14:34,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-17 10:14:34,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:14:34,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:14:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:14:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 495 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:35,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:14:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 495 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:36,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506715335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:14:36,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:14:36,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 83 [2021-12-17 10:14:36,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78035965] [2021-12-17 10:14:36,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:14:36,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-17 10:14:36,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:14:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-17 10:14:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1239, Invalid=5567, Unknown=0, NotChecked=0, Total=6806 [2021-12-17 10:14:36,034 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 83 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:14:40,210 INFO L93 Difference]: Finished difference Result 412 states and 436 transitions. [2021-12-17 10:14:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 10:14:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 83 states have internal predecessors, (167), 0 states have call successors, (0), 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 83 [2021-12-17 10:14:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:14:40,210 INFO L225 Difference]: With dead ends: 412 [2021-12-17 10:14:40,210 INFO L226 Difference]: Without dead ends: 351 [2021-12-17 10:14:40,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8605 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4173, Invalid=20319, Unknown=0, NotChecked=0, Total=24492 [2021-12-17 10:14:40,211 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 90 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:14:40,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 325 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:14:40,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-17 10:14:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 121. [2021-12-17 10:14:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:14:40,905 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:14:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:14:40,905 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:14:40,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 83 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:40,906 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:14:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:14:40,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:14:40,906 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:14:40,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-12-17 10:14:41,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:41,109 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:14:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:14:41,109 INFO L85 PathProgramCache]: Analyzing trace with hash -334833412, now seen corresponding path program 139 times [2021-12-17 10:14:41,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:14:41,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620895888] [2021-12-17 10:14:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:14:41,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:14:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:14:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 443 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:41,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:14:41,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620895888] [2021-12-17 10:14:41,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620895888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:14:41,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645063481] [2021-12-17 10:14:41,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:14:41,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:41,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:14:41,557 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:14:41,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-12-17 10:14:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:14:41,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:14:41,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:14:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 495 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:42,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:14:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 495 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:42,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645063481] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:14:42,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:14:42,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 82 [2021-12-17 10:14:42,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21775161] [2021-12-17 10:14:42,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:14:42,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-17 10:14:42,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:14:42,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-17 10:14:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=5453, Unknown=0, NotChecked=0, Total=6642 [2021-12-17 10:14:42,834 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 82 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) [2021-12-17 10:14:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:14:48,328 INFO L93 Difference]: Finished difference Result 487 states and 512 transitions. [2021-12-17 10:14:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-17 10:14:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 82 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) Word has length 83 [2021-12-17 10:14:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:14:48,329 INFO L225 Difference]: With dead ends: 487 [2021-12-17 10:14:48,329 INFO L226 Difference]: Without dead ends: 426 [2021-12-17 10:14:48,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10250 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4887, Invalid=23843, Unknown=0, NotChecked=0, Total=28730 [2021-12-17 10:14:48,330 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 147 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:14:48,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 306 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:14:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-12-17 10:14:49,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 121. [2021-12-17 10:14:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:14:49,095 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:14:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:14:49,095 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:14:49,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 82 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) [2021-12-17 10:14:49,095 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:14:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:14:49,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:14:49,095 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:14:49,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-12-17 10:14:49,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:49,296 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:14:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:14:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1277915421, now seen corresponding path program 140 times [2021-12-17 10:14:49,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:14:49,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256261023] [2021-12-17 10:14:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:14:49,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:14:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:14:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 443 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:49,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:14:49,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256261023] [2021-12-17 10:14:49,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256261023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:14:49,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869403238] [2021-12-17 10:14:49,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:14:49,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:14:49,735 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:14:49,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-12-17 10:14:49,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:14:49,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:14:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:14:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:14:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 495 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:50,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:14:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 495 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:50,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869403238] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:14:50,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:14:50,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 81 [2021-12-17 10:14:50,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672983334] [2021-12-17 10:14:50,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:14:50,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-17 10:14:50,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:14:50,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-17 10:14:50,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=5337, Unknown=0, NotChecked=0, Total=6480 [2021-12-17 10:14:50,982 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 81 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:14:56,921 INFO L93 Difference]: Finished difference Result 561 states and 587 transitions. [2021-12-17 10:14:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-17 10:14:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 81 states have internal predecessors, (165), 0 states have call successors, (0), 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 83 [2021-12-17 10:14:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:14:56,922 INFO L225 Difference]: With dead ends: 561 [2021-12-17 10:14:56,922 INFO L226 Difference]: Without dead ends: 500 [2021-12-17 10:14:56,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11787 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5557, Invalid=27023, Unknown=0, NotChecked=0, Total=32580 [2021-12-17 10:14:56,923 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 211 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:14:56,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 356 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:14:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-12-17 10:14:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 121. [2021-12-17 10:14:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:14:57,649 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:14:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:14:57,649 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:14:57,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 81 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:14:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:14:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:14:57,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:14:57,650 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:14:57,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-12-17 10:14:57,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-12-17 10:14:57,850 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:14:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:14:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash 360108252, now seen corresponding path program 141 times [2021-12-17 10:14:57,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:14:57,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134339191] [2021-12-17 10:14:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:14:57,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:14:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:14:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 443 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:58,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:14:58,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134339191] [2021-12-17 10:14:58,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134339191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:14:58,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656311889] [2021-12-17 10:14:58,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:14:58,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:14:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:14:58,298 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:14:58,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-12-17 10:14:58,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-17 10:14:58,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:14:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:14:58,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:14:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 495 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:59,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:14:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 495 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:14:59,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656311889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:14:59,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:14:59,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 80 [2021-12-17 10:14:59,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627304601] [2021-12-17 10:14:59,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:14:59,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-17 10:14:59,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:14:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-17 10:14:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=5219, Unknown=0, NotChecked=0, Total=6320 [2021-12-17 10:14:59,561 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 80 states, 80 states have (on average 2.05) internal successors, (164), 80 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:15:06,512 INFO L93 Difference]: Finished difference Result 634 states and 661 transitions. [2021-12-17 10:15:06,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-12-17 10:15:06,512 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 80 states have internal predecessors, (164), 0 states have call successors, (0), 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 83 [2021-12-17 10:15:06,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:15:06,513 INFO L225 Difference]: With dead ends: 634 [2021-12-17 10:15:06,513 INFO L226 Difference]: Without dead ends: 573 [2021-12-17 10:15:06,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13148 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6150, Invalid=29760, Unknown=0, NotChecked=0, Total=35910 [2021-12-17 10:15:06,514 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:15:06,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 307 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:15:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-12-17 10:15:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 121. [2021-12-17 10:15:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:15:07,334 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:15:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:15:07,334 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:15:07,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 80 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:15:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:15:07,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:15:07,335 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:15:07,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2021-12-17 10:15:07,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-12-17 10:15:07,535 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:15:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:15:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash 191954237, now seen corresponding path program 142 times [2021-12-17 10:15:07,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:15:07,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931839093] [2021-12-17 10:15:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:15:07,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:15:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:15:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 443 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:07,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:15:07,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931839093] [2021-12-17 10:15:07,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931839093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:15:07,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283743976] [2021-12-17 10:15:07,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:15:07,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:15:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:15:07,977 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:15:07,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-12-17 10:15:08,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:15:08,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:15:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:15:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:15:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 495 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:09,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:15:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 495 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:09,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283743976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:15:09,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:15:09,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 79 [2021-12-17 10:15:09,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409088364] [2021-12-17 10:15:09,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:15:09,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-17 10:15:09,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:15:09,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-17 10:15:09,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1063, Invalid=5099, Unknown=0, NotChecked=0, Total=6162 [2021-12-17 10:15:09,236 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:15:17,008 INFO L93 Difference]: Finished difference Result 706 states and 734 transitions. [2021-12-17 10:15:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-17 10:15:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 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 83 [2021-12-17 10:15:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:15:17,009 INFO L225 Difference]: With dead ends: 706 [2021-12-17 10:15:17,009 INFO L226 Difference]: Without dead ends: 645 [2021-12-17 10:15:17,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14277 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6639, Invalid=31973, Unknown=0, NotChecked=0, Total=38612 [2021-12-17 10:15:17,011 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 211 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:15:17,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 381 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:15:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-12-17 10:15:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 121. [2021-12-17 10:15:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:15:17,761 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:15:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:15:17,761 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:15:17,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:15:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:15:17,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:15:17,762 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:15:17,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-12-17 10:15:17,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:15:17,962 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:15:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:15:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1891680068, now seen corresponding path program 143 times [2021-12-17 10:15:17,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:15:17,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559655502] [2021-12-17 10:15:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:15:17,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:15:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:15:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 443 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:18,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:15:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559655502] [2021-12-17 10:15:18,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559655502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:15:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798199820] [2021-12-17 10:15:18,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:15:18,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:15:18,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:15:18,405 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:15:18,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-12-17 10:15:18,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-17 10:15:18,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:15:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:15:18,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:15:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 495 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:19,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:15:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 495 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:19,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798199820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:15:19,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:15:19,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 78 [2021-12-17 10:15:19,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702514330] [2021-12-17 10:15:19,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:15:19,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-17 10:15:19,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:15:19,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-17 10:15:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=4977, Unknown=0, NotChecked=0, Total=6006 [2021-12-17 10:15:19,610 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:15:28,383 INFO L93 Difference]: Finished difference Result 777 states and 806 transitions. [2021-12-17 10:15:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-17 10:15:28,383 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 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 83 [2021-12-17 10:15:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:15:28,383 INFO L225 Difference]: With dead ends: 777 [2021-12-17 10:15:28,383 INFO L226 Difference]: Without dead ends: 716 [2021-12-17 10:15:28,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15130 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7003, Invalid=33599, Unknown=0, NotChecked=0, Total=40602 [2021-12-17 10:15:28,385 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 319 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:15:28,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 458 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:15:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-12-17 10:15:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 121. [2021-12-17 10:15:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:15:29,292 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:15:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:15:29,292 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:15:29,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:15:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:15:29,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:15:29,292 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:15:29,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-12-17 10:15:29,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:15:29,493 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:15:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:15:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1089147229, now seen corresponding path program 144 times [2021-12-17 10:15:29,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:15:29,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906681849] [2021-12-17 10:15:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:15:29,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:15:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:15:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 443 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:29,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:15:29,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906681849] [2021-12-17 10:15:29,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906681849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:15:29,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824617601] [2021-12-17 10:15:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:15:29,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:15:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:15:29,932 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:15:29,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-12-17 10:15:29,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-17 10:15:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:15:29,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:15:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:15:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 495 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:31,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:15:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 495 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:31,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824617601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:15:31,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:15:31,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 77 [2021-12-17 10:15:31,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450975834] [2021-12-17 10:15:31,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:15:31,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-17 10:15:31,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:15:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-17 10:15:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=4853, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 10:15:31,159 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 77 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:15:40,663 INFO L93 Difference]: Finished difference Result 847 states and 877 transitions. [2021-12-17 10:15:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-17 10:15:40,664 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 77 states have internal predecessors, (161), 0 states have call successors, (0), 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 83 [2021-12-17 10:15:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:15:40,664 INFO L225 Difference]: With dead ends: 847 [2021-12-17 10:15:40,664 INFO L226 Difference]: Without dead ends: 786 [2021-12-17 10:15:40,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15675 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7227, Invalid=34593, Unknown=0, NotChecked=0, Total=41820 [2021-12-17 10:15:40,666 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 303 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:15:40,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 387 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:15:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-12-17 10:15:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 121. [2021-12-17 10:15:41,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:15:41,524 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:15:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:15:41,524 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:15:41,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 77 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:41,524 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:15:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:15:41,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:15:41,525 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:15:41,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2021-12-17 10:15:41,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:15:41,725 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:15:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:15:41,725 INFO L85 PathProgramCache]: Analyzing trace with hash 908208284, now seen corresponding path program 145 times [2021-12-17 10:15:41,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:15:41,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191185549] [2021-12-17 10:15:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:15:41,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:15:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:15:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 443 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:42,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:15:42,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191185549] [2021-12-17 10:15:42,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191185549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:15:42,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569570888] [2021-12-17 10:15:42,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:15:42,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:15:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:15:42,167 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:15:42,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-12-17 10:15:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:15:42,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:15:42,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:15:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 495 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:43,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:15:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 495 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:43,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569570888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:15:43,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:15:43,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 76 [2021-12-17 10:15:43,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466205292] [2021-12-17 10:15:43,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:15:43,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-17 10:15:43,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:15:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-17 10:15:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=973, Invalid=4727, Unknown=0, NotChecked=0, Total=5700 [2021-12-17 10:15:43,361 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:15:53,164 INFO L93 Difference]: Finished difference Result 916 states and 947 transitions. [2021-12-17 10:15:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-17 10:15:53,164 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 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 83 [2021-12-17 10:15:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:15:53,165 INFO L225 Difference]: With dead ends: 916 [2021-12-17 10:15:53,165 INFO L226 Difference]: Without dead ends: 855 [2021-12-17 10:15:53,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15892 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7302, Invalid=34928, Unknown=0, NotChecked=0, Total=42230 [2021-12-17 10:15:53,167 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 329 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:15:53,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 418 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:15:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-17 10:15:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 121. [2021-12-17 10:15:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:15:54,029 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:15:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:15:54,029 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:15:54,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:15:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:15:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:15:54,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:15:54,030 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:15:54,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-12-17 10:15:54,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:15:54,230 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:15:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:15:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2145669763, now seen corresponding path program 146 times [2021-12-17 10:15:54,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:15:54,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013248936] [2021-12-17 10:15:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:15:54,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:15:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:15:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 443 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:54,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:15:54,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013248936] [2021-12-17 10:15:54,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013248936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:15:54,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52423424] [2021-12-17 10:15:54,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:15:54,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:15:54,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:15:54,664 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:15:54,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-12-17 10:15:54,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:15:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:15:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:15:54,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:15:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 495 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:55,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:15:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 495 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:15:55,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52423424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:15:55,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:15:55,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 75 [2021-12-17 10:15:55,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616810408] [2021-12-17 10:15:55,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:15:55,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-17 10:15:55,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:15:55,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-17 10:15:55,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=4599, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 10:15:55,801 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 75 states, 75 states have (on average 2.12) internal successors, (159), 75 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:16:05,983 INFO L93 Difference]: Finished difference Result 984 states and 1016 transitions. [2021-12-17 10:16:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-17 10:16:05,983 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.12) internal successors, (159), 75 states have internal predecessors, (159), 0 states have call successors, (0), 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 83 [2021-12-17 10:16:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:16:05,984 INFO L225 Difference]: With dead ends: 984 [2021-12-17 10:16:05,984 INFO L226 Difference]: Without dead ends: 923 [2021-12-17 10:16:05,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15772 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7225, Invalid=34595, Unknown=0, NotChecked=0, Total=41820 [2021-12-17 10:16:05,986 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 325 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:16:05,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 374 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:16:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-12-17 10:16:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 121. [2021-12-17 10:16:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:16:06,819 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:16:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:16:06,819 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:16:06,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.12) internal successors, (159), 75 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:16:06,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:16:06,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:16:06,819 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:16:06,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2021-12-17 10:16:07,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-12-17 10:16:07,020 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:16:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:16:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash -27424644, now seen corresponding path program 147 times [2021-12-17 10:16:07,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:16:07,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873471441] [2021-12-17 10:16:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:16:07,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:16:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:16:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 443 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:07,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:16:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873471441] [2021-12-17 10:16:07,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873471441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:16:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435694496] [2021-12-17 10:16:07,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:16:07,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:16:07,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:16:07,452 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:16:07,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-12-17 10:16:07,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-17 10:16:07,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:16:07,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:16:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:16:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 495 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:08,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:16:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 495 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:08,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435694496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:16:08,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:16:08,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 74 [2021-12-17 10:16:08,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244098080] [2021-12-17 10:16:08,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:16:08,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-17 10:16:08,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:16:08,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-17 10:16:08,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=4469, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 10:16:08,583 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 74 states, 74 states have (on average 2.135135135135135) internal successors, (158), 74 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:16:19,335 INFO L93 Difference]: Finished difference Result 1051 states and 1084 transitions. [2021-12-17 10:16:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-17 10:16:19,335 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.135135135135135) internal successors, (158), 74 states have internal predecessors, (158), 0 states have call successors, (0), 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 83 [2021-12-17 10:16:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:16:19,336 INFO L225 Difference]: With dead ends: 1051 [2021-12-17 10:16:19,336 INFO L226 Difference]: Without dead ends: 990 [2021-12-17 10:16:19,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15312 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6999, Invalid=33603, Unknown=0, NotChecked=0, Total=40602 [2021-12-17 10:16:19,338 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 408 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:16:19,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 379 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:16:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-12-17 10:16:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 121. [2021-12-17 10:16:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:16:20,124 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:16:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:16:20,124 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:16:20,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.135135135135135) internal successors, (158), 74 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:16:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:16:20,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:16:20,124 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:16:20,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-12-17 10:16:20,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-12-17 10:16:20,325 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:16:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:16:20,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1426379165, now seen corresponding path program 148 times [2021-12-17 10:16:20,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:16:20,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210417475] [2021-12-17 10:16:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:16:20,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:16:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:16:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 443 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:20,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:16:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210417475] [2021-12-17 10:16:20,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210417475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:16:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435936970] [2021-12-17 10:16:20,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:16:20,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:16:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:16:20,790 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:16:20,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-12-17 10:16:20,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:16:20,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:16:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:16:20,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:16:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 495 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:21,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:16:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 495 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:21,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435936970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:16:21,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:16:21,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 73 [2021-12-17 10:16:21,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192526561] [2021-12-17 10:16:21,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:16:21,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-17 10:16:21,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:16:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-17 10:16:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=4337, Unknown=0, NotChecked=0, Total=5256 [2021-12-17 10:16:21,952 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 73 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:16:32,641 INFO L93 Difference]: Finished difference Result 1117 states and 1151 transitions. [2021-12-17 10:16:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-17 10:16:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 73 states have internal predecessors, (157), 0 states have call successors, (0), 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 83 [2021-12-17 10:16:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:16:32,642 INFO L225 Difference]: With dead ends: 1117 [2021-12-17 10:16:32,642 INFO L226 Difference]: Without dead ends: 1056 [2021-12-17 10:16:32,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14520 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6633, Invalid=31979, Unknown=0, NotChecked=0, Total=38612 [2021-12-17 10:16:32,643 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 454 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:16:32,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 468 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:16:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-12-17 10:16:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 121. [2021-12-17 10:16:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:16:33,437 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:16:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:16:33,437 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:16:33,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 73 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:16:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:16:33,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:16:33,438 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:16:33,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2021-12-17 10:16:33,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-12-17 10:16:33,638 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:16:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:16:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash -743481252, now seen corresponding path program 149 times [2021-12-17 10:16:33,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:16:33,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165255639] [2021-12-17 10:16:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:16:33,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:16:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:16:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 443 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:34,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:16:34,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165255639] [2021-12-17 10:16:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165255639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:16:34,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881085302] [2021-12-17 10:16:34,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:16:34,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:16:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:16:34,067 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:16:34,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-12-17 10:16:34,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-17 10:16:34,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:16:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:16:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:16:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 495 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:35,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:16:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 495 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:35,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881085302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:16:35,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:16:35,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 72 [2021-12-17 10:16:35,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647055831] [2021-12-17 10:16:35,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:16:35,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-17 10:16:35,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:16:35,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-17 10:16:35,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=4203, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 10:16:35,159 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:16:46,615 INFO L93 Difference]: Finished difference Result 1182 states and 1217 transitions. [2021-12-17 10:16:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-17 10:16:46,615 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 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 83 [2021-12-17 10:16:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:16:46,616 INFO L225 Difference]: With dead ends: 1182 [2021-12-17 10:16:46,616 INFO L226 Difference]: Without dead ends: 1121 [2021-12-17 10:16:46,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13416 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6142, Invalid=29768, Unknown=0, NotChecked=0, Total=35910 [2021-12-17 10:16:46,618 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 516 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:16:46,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 516 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 10:16:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-12-17 10:16:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 121. [2021-12-17 10:16:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:16:47,502 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:16:47,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:16:47,502 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:16:47,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:16:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:16:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:16:47,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:16:47,502 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:16:47,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2021-12-17 10:16:47,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-12-17 10:16:47,703 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:16:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:16:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1680375229, now seen corresponding path program 150 times [2021-12-17 10:16:47,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:16:47,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060282931] [2021-12-17 10:16:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:16:47,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:16:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:16:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 443 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:48,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:16:48,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060282931] [2021-12-17 10:16:48,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060282931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:16:48,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662485964] [2021-12-17 10:16:48,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:16:48,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:16:48,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:16:48,147 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:16:48,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-12-17 10:16:48,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-17 10:16:48,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:16:48,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:16:48,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:16:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 495 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:49,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:16:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 495 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:16:49,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662485964] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:16:49,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:16:49,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 71 [2021-12-17 10:16:49,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186618081] [2021-12-17 10:16:49,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:16:49,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-17 10:16:49,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:16:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-17 10:16:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=4067, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 10:16:49,264 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:17:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:17:00,596 INFO L93 Difference]: Finished difference Result 1246 states and 1282 transitions. [2021-12-17 10:17:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-17 10:17:00,596 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 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 83 [2021-12-17 10:17:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:17:00,597 INFO L225 Difference]: With dead ends: 1246 [2021-12-17 10:17:00,597 INFO L226 Difference]: Without dead ends: 1185 [2021-12-17 10:17:00,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12032 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5547, Invalid=27033, Unknown=0, NotChecked=0, Total=32580 [2021-12-17 10:17:00,598 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 443 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:17:00,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 467 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:17:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-12-17 10:17:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 121. [2021-12-17 10:17:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:17:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2021-12-17 10:17:01,449 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 83 [2021-12-17 10:17:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:17:01,449 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2021-12-17 10:17:01,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:17:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2021-12-17 10:17:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 10:17:01,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:17:01,449 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:17:01,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-12-17 10:17:01,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-12-17 10:17:01,650 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:17:01,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:17:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2035658812, now seen corresponding path program 151 times [2021-12-17 10:17:01,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:17:01,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994916062] [2021-12-17 10:17:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:17:01,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:17:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:17:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 443 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:17:02,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:17:02,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994916062] [2021-12-17 10:17:02,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994916062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:17:02,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96366078] [2021-12-17 10:17:02,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:17:02,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:17:02,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:17:02,101 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:17:02,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-12-17 10:17:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:17:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 10:17:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:17:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 495 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:17:03,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:17:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 495 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:17:03,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96366078] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:17:03,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:17:03,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 70 [2021-12-17 10:17:03,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186984431] [2021-12-17 10:17:03,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:17:03,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-17 10:17:03,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:17:03,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-17 10:17:03,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=3929, Unknown=0, NotChecked=0, Total=4830 [2021-12-17 10:17:03,172 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 70 states, 70 states have (on average 2.2) internal successors, (154), 70 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15