./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/vogal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/loops/vogal-1.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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 14:55:54,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 14:55:54,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 14:55:54,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 14:55:54,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 14:55:54,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 14:55:54,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 14:55:54,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 14:55:54,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 14:55:54,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 14:55:54,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 14:55:54,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 14:55:54,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 14:55:54,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 14:55:54,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 14:55:54,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 14:55:54,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 14:55:54,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 14:55:54,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 14:55:54,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 14:55:54,865 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 14:55:54,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 14:55:54,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 14:55:54,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 14:55:54,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 14:55:54,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 14:55:54,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 14:55:54,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 14:55:54,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 14:55:54,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 14:55:54,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 14:55:54,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 14:55:54,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 14:55:54,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 14:55:54,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 14:55:54,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 14:55:54,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 14:55:54,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 14:55:54,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 14:55:54,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 14:55:54,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 14:55:54,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 14:55:54,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 14:55:54,918 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 14:55:54,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 14:55:54,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 14:55:54,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 14:55:54,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 14:55:54,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 14:55:54,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 14:55:54,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 14:55:54,921 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 14:55:54,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 14:55:54,923 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 14:55:54,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 14:55:54,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 14:55:54,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 14:55:54,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 14:55:54,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 14:55:54,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 14:55:54,924 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 14:55:54,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 14:55:54,924 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 14:55:54,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 14:55:54,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 14:55:54,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 14:55:54,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 14:55:54,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:55:54,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 14:55:54,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 14:55:54,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 14:55:54,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 14:55:54,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 14:55:54,927 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 14:55:54,927 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 14:55:54,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 14:55:54,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2022-07-19 14:55:55,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 14:55:55,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 14:55:55,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 14:55:55,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 14:55:55,170 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 14:55:55,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/vogal-1.i [2022-07-19 14:55:55,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8c12e18/cfd55043c5a94e1fba133b1df1bff9f1/FLAG94a8e44a7 [2022-07-19 14:55:55,642 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 14:55:55,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i [2022-07-19 14:55:55,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8c12e18/cfd55043c5a94e1fba133b1df1bff9f1/FLAG94a8e44a7 [2022-07-19 14:55:56,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8c12e18/cfd55043c5a94e1fba133b1df1bff9f1 [2022-07-19 14:55:56,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 14:55:56,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 14:55:56,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 14:55:56,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 14:55:56,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 14:55:56,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@153dc62c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56, skipping insertion in model container [2022-07-19 14:55:56,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 14:55:56,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 14:55:56,199 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/loops/vogal-1.i[895,908] [2022-07-19 14:55:56,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:55:56,253 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 14:55:56,268 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/loops/vogal-1.i[895,908] [2022-07-19 14:55:56,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:55:56,293 INFO L208 MainTranslator]: Completed translation [2022-07-19 14:55:56,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56 WrapperNode [2022-07-19 14:55:56,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 14:55:56,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 14:55:56,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 14:55:56,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 14:55:56,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,322 INFO L137 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2022-07-19 14:55:56,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 14:55:56,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 14:55:56,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 14:55:56,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 14:55:56,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 14:55:56,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 14:55:56,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 14:55:56,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 14:55:56,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (1/1) ... [2022-07-19 14:55:56,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:55:56,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:55:56,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 14:55:56,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 14:55:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 14:55:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 14:55:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 14:55:56,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 14:55:56,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 14:55:56,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 14:55:56,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 14:55:56,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 14:55:56,452 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 14:55:56,454 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 14:55:56,600 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 14:55:56,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 14:55:56,606 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 14:55:56,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:55:56 BoogieIcfgContainer [2022-07-19 14:55:56,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 14:55:56,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 14:55:56,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 14:55:56,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 14:55:56,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 02:55:56" (1/3) ... [2022-07-19 14:55:56,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b61e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:55:56, skipping insertion in model container [2022-07-19 14:55:56,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:55:56" (2/3) ... [2022-07-19 14:55:56,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b61e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:55:56, skipping insertion in model container [2022-07-19 14:55:56,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:55:56" (3/3) ... [2022-07-19 14:55:56,614 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-07-19 14:55:56,626 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 14:55:56,626 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 14:55:56,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 14:55:56,685 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@27ff371b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@aff7dd2 [2022-07-19 14:55:56,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 14:55:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) [2022-07-19 14:55:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 14:55:56,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:55:56,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:55:56,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:55:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:55:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2022-07-19 14:55:56,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:55:56,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141815079] [2022-07-19 14:55:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:56,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:55:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:55:56,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:55:56,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141815079] [2022-07-19 14:55:56,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141815079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:55:56,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:55:56,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 14:55:56,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091686072] [2022-07-19 14:55:56,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:55:56,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 14:55:56,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:55:56,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 14:55:56,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:55:56,871 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:55:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:55:56,885 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2022-07-19 14:55:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 14:55:56,887 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-19 14:55:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:55:56,893 INFO L225 Difference]: With dead ends: 54 [2022-07-19 14:55:56,894 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 14:55:56,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:55:56,904 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:55:56,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:55:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 14:55:56,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-19 14:55:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2022-07-19 14:55:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-07-19 14:55:56,934 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-07-19 14:55:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:55:56,935 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-07-19 14:55:56,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:55:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-07-19 14:55:56,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 14:55:56,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:55:56,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:55:56,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 14:55:56,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:55:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:55:56,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2022-07-19 14:55:56,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:55:56,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759660464] [2022-07-19 14:55:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:55:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:55:57,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:55:57,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759660464] [2022-07-19 14:55:57,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759660464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:55:57,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:55:57,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:55:57,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112975118] [2022-07-19 14:55:57,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:55:57,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:55:57,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:55:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:55:57,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:55:57,073 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:55:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:55:57,132 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-07-19 14:55:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:55:57,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-19 14:55:57,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:55:57,134 INFO L225 Difference]: With dead ends: 64 [2022-07-19 14:55:57,134 INFO L226 Difference]: Without dead ends: 43 [2022-07-19 14:55:57,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:55:57,136 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:55:57,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:55:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-19 14:55:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2022-07-19 14:55:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 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) [2022-07-19 14:55:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-07-19 14:55:57,142 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2022-07-19 14:55:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:55:57,142 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-07-19 14:55:57,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:55:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-07-19 14:55:57,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 14:55:57,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:55:57,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:55:57,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 14:55:57,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:55:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:55:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2022-07-19 14:55:57,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:55:57,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483079942] [2022-07-19 14:55:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:57,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:55:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:55:57,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:55:57,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483079942] [2022-07-19 14:55:57,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483079942] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:55:57,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482337171] [2022-07-19 14:55:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:57,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:55:57,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:55:57,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:55:57,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 14:55:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 14:55:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:55:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:55:57,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:55:57,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482337171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:55:57,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 14:55:57,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-07-19 14:55:57,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607347299] [2022-07-19 14:55:57,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:55:57,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 14:55:57,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:55:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 14:55:57,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 14:55:57,463 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:55:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:55:57,511 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-07-19 14:55:57,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 14:55:57,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 14:55:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:55:57,514 INFO L225 Difference]: With dead ends: 52 [2022-07-19 14:55:57,514 INFO L226 Difference]: Without dead ends: 48 [2022-07-19 14:55:57,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:55:57,516 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:55:57,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:55:57,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-19 14:55:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-07-19 14:55:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 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) [2022-07-19 14:55:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-07-19 14:55:57,527 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2022-07-19 14:55:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:55:57,528 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-07-19 14:55:57,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:55:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-07-19 14:55:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 14:55:57,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:55:57,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:55:57,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 14:55:57,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:55:57,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:55:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:55:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2138024952, now seen corresponding path program 1 times [2022-07-19 14:55:57,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:55:57,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24105558] [2022-07-19 14:55:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:57,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:55:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 14:55:57,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:55:57,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24105558] [2022-07-19 14:55:57,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24105558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:55:57,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058130198] [2022-07-19 14:55:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:57,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:55:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:55:57,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:55:57,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 14:55:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 14:55:57,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:55:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 14:55:57,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:55:57,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058130198] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:55:57,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 14:55:57,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-07-19 14:55:57,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422509312] [2022-07-19 14:55:57,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:55:57,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 14:55:57,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:55:57,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 14:55:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 14:55:57,904 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:55:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:55:57,940 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-07-19 14:55:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 14:55:57,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-07-19 14:55:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:55:57,941 INFO L225 Difference]: With dead ends: 97 [2022-07-19 14:55:57,941 INFO L226 Difference]: Without dead ends: 69 [2022-07-19 14:55:57,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 14:55:57,943 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:55:57,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:55:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-19 14:55:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-07-19 14:55:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 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) [2022-07-19 14:55:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-07-19 14:55:57,949 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 23 [2022-07-19 14:55:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:55:57,950 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-07-19 14:55:57,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:55:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-07-19 14:55:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 14:55:57,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:55:57,951 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:55:57,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 14:55:58,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 14:55:58,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:55:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:55:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1093571635, now seen corresponding path program 1 times [2022-07-19 14:55:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:55:58,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000515022] [2022-07-19 14:55:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:55:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 14:55:58,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:55:58,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000515022] [2022-07-19 14:55:58,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000515022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:55:58,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262368202] [2022-07-19 14:55:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:58,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:55:58,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:55:58,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:55:58,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 14:55:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 14:55:58,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:55:58,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 14:55:58,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 14:55:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:55:58,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:55:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 14:55:58,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262368202] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 14:55:58,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 14:55:58,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2022-07-19 14:55:58,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797525293] [2022-07-19 14:55:58,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:55:58,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 14:55:58,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:55:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 14:55:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-07-19 14:55:58,575 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-07-19 14:55:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:55:58,700 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2022-07-19 14:55:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 14:55:58,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 24 [2022-07-19 14:55:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:55:58,701 INFO L225 Difference]: With dead ends: 61 [2022-07-19 14:55:58,701 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 14:55:58,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-19 14:55:58,703 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:55:58,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:55:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 14:55:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-19 14:55:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 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) [2022-07-19 14:55:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-07-19 14:55:58,708 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-07-19 14:55:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:55:58,709 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-07-19 14:55:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-07-19 14:55:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-07-19 14:55:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 14:55:58,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:55:58,710 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:55:58,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 14:55:58,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:55:58,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:55:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:55:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1875229501, now seen corresponding path program 1 times [2022-07-19 14:55:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:55:58,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548817668] [2022-07-19 14:55:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:58,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:55:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 14:55:58,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:55:58,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548817668] [2022-07-19 14:55:58,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548817668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:55:58,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073134730] [2022-07-19 14:55:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:58,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:55:58,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:55:58,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:55:59,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 14:55:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 14:55:59,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:55:59,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 14:55:59,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-19 14:55:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 14:55:59,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:55:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 14:55:59,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073134730] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 14:55:59,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 14:55:59,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2022-07-19 14:55:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503632419] [2022-07-19 14:55:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:55:59,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 14:55:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:55:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 14:55:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-07-19 14:55:59,299 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2022-07-19 14:55:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:55:59,442 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-07-19 14:55:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 14:55:59,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) Word has length 25 [2022-07-19 14:55:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:55:59,445 INFO L225 Difference]: With dead ends: 66 [2022-07-19 14:55:59,445 INFO L226 Difference]: Without dead ends: 62 [2022-07-19 14:55:59,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-19 14:55:59,446 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:55:59,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 65 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 14:55:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-19 14:55:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-07-19 14:55:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 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) [2022-07-19 14:55:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-07-19 14:55:59,451 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2022-07-19 14:55:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:55:59,455 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-07-19 14:55:59,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2022-07-19 14:55:59,456 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-07-19 14:55:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 14:55:59,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:55:59,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:55:59,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 14:55:59,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:55:59,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:55:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:55:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1536847246, now seen corresponding path program 1 times [2022-07-19 14:55:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:55:59,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140555862] [2022-07-19 14:55:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:55:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 14:55:59,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:55:59,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140555862] [2022-07-19 14:55:59,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140555862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:55:59,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548307123] [2022-07-19 14:55:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:55:59,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:55:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:55:59,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:55:59,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 14:55:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:55:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 14:55:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:55:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 14:55:59,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:55:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 14:55:59,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548307123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:55:59,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:55:59,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2022-07-19 14:55:59,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332774849] [2022-07-19 14:55:59,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:55:59,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 14:55:59,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:55:59,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 14:55:59,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:55:59,852 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:00,046 INFO L93 Difference]: Finished difference Result 220 states and 289 transitions. [2022-07-19 14:56:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 14:56:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 14:56:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:00,049 INFO L225 Difference]: With dead ends: 220 [2022-07-19 14:56:00,049 INFO L226 Difference]: Without dead ends: 183 [2022-07-19 14:56:00,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-07-19 14:56:00,050 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 228 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:00,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 169 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 14:56:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-19 14:56:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 48. [2022-07-19 14:56:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 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) [2022-07-19 14:56:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-07-19 14:56:00,069 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 26 [2022-07-19 14:56:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:00,069 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-07-19 14:56:00,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-07-19 14:56:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 14:56:00,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:00,074 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:00,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:00,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:00,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:00,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1845688875, now seen corresponding path program 2 times [2022-07-19 14:56:00,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:00,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341223494] [2022-07-19 14:56:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:00,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 14:56:00,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:00,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341223494] [2022-07-19 14:56:00,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341223494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:00,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073188914] [2022-07-19 14:56:00,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 14:56:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:00,372 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:56:00,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 14:56:00,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 14:56:00,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:56:00,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 14:56:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 14:56:00,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 14:56:00,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073188914] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:00,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:00,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 10 [2022-07-19 14:56:00,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475911530] [2022-07-19 14:56:00,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:00,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 14:56:00,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:00,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 14:56:00,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-19 14:56:00,504 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2022-07-19 14:56:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:01,068 INFO L93 Difference]: Finished difference Result 390 states and 517 transitions. [2022-07-19 14:56:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 14:56:01,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-19 14:56:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:01,071 INFO L225 Difference]: With dead ends: 390 [2022-07-19 14:56:01,071 INFO L226 Difference]: Without dead ends: 349 [2022-07-19 14:56:01,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-07-19 14:56:01,072 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 634 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:01,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 277 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 14:56:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-19 14:56:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 52. [2022-07-19 14:56:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-07-19 14:56:01,085 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 30 [2022-07-19 14:56:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:01,085 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-07-19 14:56:01,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2022-07-19 14:56:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-07-19 14:56:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 14:56:01,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:01,086 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:01,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:01,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:01,307 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:01,308 INFO L85 PathProgramCache]: Analyzing trace with hash -926448804, now seen corresponding path program 1 times [2022-07-19 14:56:01,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:01,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230485594] [2022-07-19 14:56:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:01,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 14:56:01,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:01,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230485594] [2022-07-19 14:56:01,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230485594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:01,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365835025] [2022-07-19 14:56:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:01,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:01,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:01,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:56:01,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 14:56:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 14:56:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 14:56:01,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:56:01,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365835025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:56:01,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 14:56:01,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 14:56:01,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749551345] [2022-07-19 14:56:01,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:56:01,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:56:01,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:56:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 14:56:01,469 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:01,489 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2022-07-19 14:56:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:56:01,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 14:56:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:01,491 INFO L225 Difference]: With dead ends: 94 [2022-07-19 14:56:01,491 INFO L226 Difference]: Without dead ends: 64 [2022-07-19 14:56:01,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 14:56:01,492 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:01,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:56:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-19 14:56:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-07-19 14:56:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 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) [2022-07-19 14:56:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-07-19 14:56:01,502 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 33 [2022-07-19 14:56:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:01,502 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-07-19 14:56:01,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-07-19 14:56:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 14:56:01,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:01,503 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:01,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:01,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:01,719 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1399324024, now seen corresponding path program 3 times [2022-07-19 14:56:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305723702] [2022-07-19 14:56:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:01,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 14:56:01,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305723702] [2022-07-19 14:56:01,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305723702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:01,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339230178] [2022-07-19 14:56:01,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 14:56:01,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:01,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:01,805 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) [2022-07-19 14:56:01,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 14:56:01,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 14:56:01,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:56:01,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 14:56:01,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:01,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 14:56:02,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:56:02,069 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:56:02,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-19 14:56:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 14:56:02,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:02,206 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 14:56:02,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-07-19 14:56:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 14:56:02,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339230178] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:02,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 14:56:02,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 10] total 19 [2022-07-19 14:56:02,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037181222] [2022-07-19 14:56:02,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:56:02,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 14:56:02,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:02,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 14:56:02,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-07-19 14:56:02,210 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:02,311 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-07-19 14:56:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 14:56:02,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 14:56:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:02,312 INFO L225 Difference]: With dead ends: 90 [2022-07-19 14:56:02,312 INFO L226 Difference]: Without dead ends: 69 [2022-07-19 14:56:02,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-07-19 14:56:02,313 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:02,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 79 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:56:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-19 14:56:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-07-19 14:56:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 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) [2022-07-19 14:56:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-07-19 14:56:02,323 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2022-07-19 14:56:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:02,323 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-07-19 14:56:02,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-07-19 14:56:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 14:56:02,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:02,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:02,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:02,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 14:56:02,548 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1076823445, now seen corresponding path program 1 times [2022-07-19 14:56:02,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:02,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261503425] [2022-07-19 14:56:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:02,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 14:56:02,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:02,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261503425] [2022-07-19 14:56:02,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261503425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:02,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478708332] [2022-07-19 14:56:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:02,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:02,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:02,629 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) [2022-07-19 14:56:02,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 14:56:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:02,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 14:56:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 14:56:02,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 14:56:02,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478708332] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:02,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:02,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-07-19 14:56:02,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790388172] [2022-07-19 14:56:02,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:02,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 14:56:02,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:02,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 14:56:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-19 14:56:02,839 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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) [2022-07-19 14:56:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:03,651 INFO L93 Difference]: Finished difference Result 432 states and 552 transitions. [2022-07-19 14:56:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 14:56:03,652 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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 36 [2022-07-19 14:56:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:03,654 INFO L225 Difference]: With dead ends: 432 [2022-07-19 14:56:03,655 INFO L226 Difference]: Without dead ends: 382 [2022-07-19 14:56:03,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 14:56:03,658 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 459 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:03,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 926 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 14:56:03,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-07-19 14:56:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 69. [2022-07-19 14:56:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 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) [2022-07-19 14:56:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-07-19 14:56:03,683 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 36 [2022-07-19 14:56:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:03,686 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-07-19 14:56:03,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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) [2022-07-19 14:56:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-07-19 14:56:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 14:56:03,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:03,687 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:03,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:03,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:03,903 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1408390255, now seen corresponding path program 1 times [2022-07-19 14:56:03,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:03,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200201348] [2022-07-19 14:56:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:03,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 14:56:03,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:03,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200201348] [2022-07-19 14:56:03,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200201348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:03,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337598419] [2022-07-19 14:56:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:03,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:03,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:03,990 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) [2022-07-19 14:56:03,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 14:56:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:04,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 14:56:04,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:04,278 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 14:56:04,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-19 14:56:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 14:56:04,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:04,526 INFO L356 Elim1Store]: treesize reduction 37, result has 75.5 percent of original size [2022-07-19 14:56:04,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 139 [2022-07-19 14:56:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 14:56:04,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337598419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:04,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:04,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2022-07-19 14:56:04,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663122471] [2022-07-19 14:56:04,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:04,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 14:56:04,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:04,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 14:56:04,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-07-19 14:56:04,865 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 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) [2022-07-19 14:56:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:06,075 INFO L93 Difference]: Finished difference Result 549 states and 725 transitions. [2022-07-19 14:56:06,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 14:56:06,075 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 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 38 [2022-07-19 14:56:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:06,077 INFO L225 Difference]: With dead ends: 549 [2022-07-19 14:56:06,077 INFO L226 Difference]: Without dead ends: 491 [2022-07-19 14:56:06,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 14:56:06,078 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 610 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:06,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 562 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 14:56:06,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-19 14:56:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 95. [2022-07-19 14:56:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 94 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) [2022-07-19 14:56:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2022-07-19 14:56:06,105 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 38 [2022-07-19 14:56:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:06,105 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2022-07-19 14:56:06,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 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) [2022-07-19 14:56:06,106 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2022-07-19 14:56:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 14:56:06,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:06,106 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:06,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:06,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 14:56:06,319 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:06,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1678328275, now seen corresponding path program 1 times [2022-07-19 14:56:06,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:06,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11359949] [2022-07-19 14:56:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:06,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 14:56:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:06,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11359949] [2022-07-19 14:56:06,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11359949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:06,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728595002] [2022-07-19 14:56:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:06,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:06,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:06,370 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) [2022-07-19 14:56:06,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 14:56:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 14:56:06,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:06,614 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 14:56:06,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-07-19 14:56:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 14:56:06,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:06,841 INFO L356 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2022-07-19 14:56:06,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-07-19 14:56:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:56:07,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728595002] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:07,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:07,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 18 [2022-07-19 14:56:07,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510545859] [2022-07-19 14:56:07,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:07,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 14:56:07,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 14:56:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-19 14:56:07,230 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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) [2022-07-19 14:56:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:07,727 INFO L93 Difference]: Finished difference Result 313 states and 431 transitions. [2022-07-19 14:56:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 14:56:07,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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 40 [2022-07-19 14:56:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:07,729 INFO L225 Difference]: With dead ends: 313 [2022-07-19 14:56:07,729 INFO L226 Difference]: Without dead ends: 241 [2022-07-19 14:56:07,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-07-19 14:56:07,730 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 213 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:07,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 274 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 14:56:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-19 14:56:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 127. [2022-07-19 14:56:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 126 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) [2022-07-19 14:56:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2022-07-19 14:56:07,758 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 40 [2022-07-19 14:56:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:07,758 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2022-07-19 14:56:07,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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) [2022-07-19 14:56:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2022-07-19 14:56:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 14:56:07,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:07,759 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:07,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:07,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 14:56:07,978 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 2 times [2022-07-19 14:56:07,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:07,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656700209] [2022-07-19 14:56:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:07,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:56:08,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656700209] [2022-07-19 14:56:08,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656700209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77607986] [2022-07-19 14:56:08,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 14:56:08,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:08,115 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) [2022-07-19 14:56:08,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 14:56:08,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 14:56:08,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:56:08,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 14:56:08,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 14:56:08,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:56:08,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77607986] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:08,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:08,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2022-07-19 14:56:08,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252569980] [2022-07-19 14:56:08,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:08,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 14:56:08,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:08,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 14:56:08,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-19 14:56:08,485 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 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) [2022-07-19 14:56:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:09,549 INFO L93 Difference]: Finished difference Result 537 states and 691 transitions. [2022-07-19 14:56:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 14:56:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 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 46 [2022-07-19 14:56:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:09,552 INFO L225 Difference]: With dead ends: 537 [2022-07-19 14:56:09,552 INFO L226 Difference]: Without dead ends: 531 [2022-07-19 14:56:09,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 14:56:09,553 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 503 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:09,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1147 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 14:56:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-19 14:56:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 165. [2022-07-19 14:56:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2804878048780488) internal successors, (210), 164 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2022-07-19 14:56:09,598 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 46 [2022-07-19 14:56:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:09,599 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2022-07-19 14:56:09,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 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) [2022-07-19 14:56:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2022-07-19 14:56:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 14:56:09,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:09,600 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:09,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:09,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 14:56:09,824 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2022-07-19 14:56:09,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:09,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102969097] [2022-07-19 14:56:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:09,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 14:56:10,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:10,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102969097] [2022-07-19 14:56:10,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102969097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:10,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433713041] [2022-07-19 14:56:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:10,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:10,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:10,631 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) [2022-07-19 14:56:10,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 14:56:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 14:56:10,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:16,579 INFO L356 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-07-19 14:56:16,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2022-07-19 14:56:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 14:56:20,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:21,930 INFO L356 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2022-07-19 14:56:21,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-07-19 14:56:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:56:21,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433713041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:21,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:21,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 13] total 31 [2022-07-19 14:56:21,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646501697] [2022-07-19 14:56:21,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:21,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 14:56:21,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:21,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 14:56:21,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-07-19 14:56:21,938 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:24,666 INFO L93 Difference]: Finished difference Result 311 states and 402 transitions. [2022-07-19 14:56:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 14:56:24,667 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 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 46 [2022-07-19 14:56:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:24,670 INFO L225 Difference]: With dead ends: 311 [2022-07-19 14:56:24,670 INFO L226 Difference]: Without dead ends: 249 [2022-07-19 14:56:24,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 14:56:24,674 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:24,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 250 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 369 Invalid, 0 Unknown, 272 Unchecked, 0.3s Time] [2022-07-19 14:56:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-19 14:56:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2022-07-19 14:56:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.288702928870293) internal successors, (308), 239 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 308 transitions. [2022-07-19 14:56:24,737 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 308 transitions. Word has length 46 [2022-07-19 14:56:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:24,737 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 308 transitions. [2022-07-19 14:56:24,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 308 transitions. [2022-07-19 14:56:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 14:56:24,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:24,739 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:24,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:24,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 14:56:24,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:24,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:24,966 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2022-07-19 14:56:24,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:24,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006114481] [2022-07-19 14:56:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:24,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 14:56:25,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:25,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006114481] [2022-07-19 14:56:25,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006114481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:25,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286754558] [2022-07-19 14:56:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:25,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:25,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:25,472 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) [2022-07-19 14:56:25,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 14:56:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:25,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 14:56:25,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:28,857 INFO L356 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-07-19 14:56:28,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-07-19 14:56:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 14:56:32,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:33,519 INFO L356 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2022-07-19 14:56:33,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-07-19 14:56:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:56:33,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286754558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:33,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:33,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 13] total 31 [2022-07-19 14:56:33,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680686774] [2022-07-19 14:56:33,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:33,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 14:56:33,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 14:56:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-07-19 14:56:33,523 INFO L87 Difference]: Start difference. First operand 240 states and 308 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 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) [2022-07-19 14:56:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:34,020 INFO L93 Difference]: Finished difference Result 348 states and 443 transitions. [2022-07-19 14:56:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 14:56:34,020 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 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 46 [2022-07-19 14:56:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:34,022 INFO L225 Difference]: With dead ends: 348 [2022-07-19 14:56:34,022 INFO L226 Difference]: Without dead ends: 313 [2022-07-19 14:56:34,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 14:56:34,023 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 126 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:34,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 143 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 136 Invalid, 0 Unknown, 162 Unchecked, 0.1s Time] [2022-07-19 14:56:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-07-19 14:56:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 242. [2022-07-19 14:56:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2821576763485478) internal successors, (309), 241 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 309 transitions. [2022-07-19 14:56:34,092 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 309 transitions. Word has length 46 [2022-07-19 14:56:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:34,093 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 309 transitions. [2022-07-19 14:56:34,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 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) [2022-07-19 14:56:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 309 transitions. [2022-07-19 14:56:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 14:56:34,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:34,094 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:34,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:34,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:34,315 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:34,316 INFO L85 PathProgramCache]: Analyzing trace with hash -404220840, now seen corresponding path program 1 times [2022-07-19 14:56:34,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:34,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934821145] [2022-07-19 14:56:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:34,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:56:35,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:35,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934821145] [2022-07-19 14:56:35,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934821145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:35,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794161813] [2022-07-19 14:56:35,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:35,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:35,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:35,192 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) [2022-07-19 14:56:35,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 14:56:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:35,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-19 14:56:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:35,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:56:35,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:56:35,490 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:56:35,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-07-19 14:56:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 14:56:35,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:35,849 INFO L356 Elim1Store]: treesize reduction 41, result has 75.4 percent of original size [2022-07-19 14:56:35,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 151 [2022-07-19 14:56:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:56:36,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794161813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:36,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:36,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 27 [2022-07-19 14:56:36,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085968686] [2022-07-19 14:56:36,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:36,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 14:56:36,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 14:56:36,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-07-19 14:56:36,094 INFO L87 Difference]: Start difference. First operand 242 states and 309 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 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) [2022-07-19 14:56:36,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:36,952 INFO L93 Difference]: Finished difference Result 696 states and 904 transitions. [2022-07-19 14:56:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 14:56:36,953 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 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 46 [2022-07-19 14:56:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:36,954 INFO L225 Difference]: With dead ends: 696 [2022-07-19 14:56:36,955 INFO L226 Difference]: Without dead ends: 428 [2022-07-19 14:56:36,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 14:56:36,956 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:36,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 323 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 440 Invalid, 0 Unknown, 93 Unchecked, 0.4s Time] [2022-07-19 14:56:36,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-07-19 14:56:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 307. [2022-07-19 14:56:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.2777777777777777) internal successors, (391), 306 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:37,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 391 transitions. [2022-07-19 14:56:37,030 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 391 transitions. Word has length 46 [2022-07-19 14:56:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:37,031 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 391 transitions. [2022-07-19 14:56:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 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) [2022-07-19 14:56:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 391 transitions. [2022-07-19 14:56:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 14:56:37,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:37,032 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:37,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:37,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 14:56:37,247 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash -661577384, now seen corresponding path program 1 times [2022-07-19 14:56:37,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:37,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524587000] [2022-07-19 14:56:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:56:38,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:38,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524587000] [2022-07-19 14:56:38,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524587000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:38,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310233955] [2022-07-19 14:56:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:38,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:38,016 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) [2022-07-19 14:56:38,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 14:56:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:38,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 14:56:38,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:38,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:56:38,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:56:38,330 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:56:38,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-07-19 14:56:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 14:56:38,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:38,696 INFO L356 Elim1Store]: treesize reduction 50, result has 70.1 percent of original size [2022-07-19 14:56:38,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 141 [2022-07-19 14:56:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:56:38,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310233955] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:38,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:38,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-07-19 14:56:38,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228177881] [2022-07-19 14:56:38,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:38,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 14:56:38,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 14:56:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-07-19 14:56:38,955 INFO L87 Difference]: Start difference. First operand 307 states and 391 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 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) [2022-07-19 14:56:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:39,814 INFO L93 Difference]: Finished difference Result 513 states and 653 transitions. [2022-07-19 14:56:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 14:56:39,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 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 46 [2022-07-19 14:56:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:39,816 INFO L225 Difference]: With dead ends: 513 [2022-07-19 14:56:39,816 INFO L226 Difference]: Without dead ends: 410 [2022-07-19 14:56:39,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=359, Invalid=1047, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 14:56:39,818 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:39,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 244 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 366 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-07-19 14:56:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-19 14:56:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 268. [2022-07-19 14:56:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.2546816479400749) internal successors, (335), 267 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 335 transitions. [2022-07-19 14:56:39,880 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 335 transitions. Word has length 46 [2022-07-19 14:56:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:39,880 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 335 transitions. [2022-07-19 14:56:39,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 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) [2022-07-19 14:56:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 335 transitions. [2022-07-19 14:56:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 14:56:39,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:39,881 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:39,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-19 14:56:40,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 14:56:40,082 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1978872450, now seen corresponding path program 1 times [2022-07-19 14:56:40,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:40,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857760979] [2022-07-19 14:56:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:40,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 14:56:40,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:40,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857760979] [2022-07-19 14:56:40,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857760979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:40,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952181612] [2022-07-19 14:56:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:40,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:40,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:40,176 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) [2022-07-19 14:56:40,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 14:56:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 14:56:40,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 14:56:40,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 14:56:40,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952181612] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:40,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:40,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-07-19 14:56:40,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418535758] [2022-07-19 14:56:40,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:40,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 14:56:40,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:40,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 14:56:40,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-19 14:56:40,398 INFO L87 Difference]: Start difference. First operand 268 states and 335 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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) [2022-07-19 14:56:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:40,667 INFO L93 Difference]: Finished difference Result 646 states and 806 transitions. [2022-07-19 14:56:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 14:56:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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 55 [2022-07-19 14:56:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:40,668 INFO L225 Difference]: With dead ends: 646 [2022-07-19 14:56:40,668 INFO L226 Difference]: Without dead ends: 413 [2022-07-19 14:56:40,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-19 14:56:40,669 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 197 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:40,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 179 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 14:56:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-19 14:56:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 292. [2022-07-19 14:56:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.2439862542955327) internal successors, (362), 291 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 362 transitions. [2022-07-19 14:56:40,744 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 362 transitions. Word has length 55 [2022-07-19 14:56:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:40,745 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 362 transitions. [2022-07-19 14:56:40,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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) [2022-07-19 14:56:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 362 transitions. [2022-07-19 14:56:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 14:56:40,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:40,748 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:40,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:40,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:40,963 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:40,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1403496468, now seen corresponding path program 2 times [2022-07-19 14:56:40,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:40,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150177381] [2022-07-19 14:56:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:40,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 14:56:41,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150177381] [2022-07-19 14:56:41,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150177381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136069818] [2022-07-19 14:56:41,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 14:56:41,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:41,482 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) [2022-07-19 14:56:41,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 14:56:41,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 14:56:41,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:56:41,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 14:56:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:47,161 INFO L356 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-07-19 14:56:47,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-07-19 14:56:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 14:56:48,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:50,102 INFO L356 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2022-07-19 14:56:50,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-07-19 14:56:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 14:56:50,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136069818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:50,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:50,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-07-19 14:56:50,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227183906] [2022-07-19 14:56:50,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:50,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 14:56:50,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 14:56:50,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 14:56:50,106 INFO L87 Difference]: Start difference. First operand 292 states and 362 transitions. Second operand has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 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) [2022-07-19 14:56:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:59,124 INFO L93 Difference]: Finished difference Result 681 states and 850 transitions. [2022-07-19 14:56:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-19 14:56:59,124 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 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 56 [2022-07-19 14:56:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:59,126 INFO L225 Difference]: With dead ends: 681 [2022-07-19 14:56:59,126 INFO L226 Difference]: Without dead ends: 598 [2022-07-19 14:56:59,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1032, Invalid=6278, Unknown=0, NotChecked=0, Total=7310 [2022-07-19 14:56:59,128 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 109 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:59,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 264 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 302 Invalid, 0 Unknown, 345 Unchecked, 0.2s Time] [2022-07-19 14:56:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-07-19 14:56:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 463. [2022-07-19 14:56:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.2662337662337662) internal successors, (585), 462 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:56:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 585 transitions. [2022-07-19 14:56:59,258 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 585 transitions. Word has length 56 [2022-07-19 14:56:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:59,258 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 585 transitions. [2022-07-19 14:56:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 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) [2022-07-19 14:56:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 585 transitions. [2022-07-19 14:56:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 14:56:59,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:59,260 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:59,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:59,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:59,468 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:59,468 INFO L85 PathProgramCache]: Analyzing trace with hash -41484349, now seen corresponding path program 3 times [2022-07-19 14:56:59,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:59,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632615225] [2022-07-19 14:56:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:59,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:57:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 14:57:00,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:57:00,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632615225] [2022-07-19 14:57:00,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632615225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:57:00,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669949972] [2022-07-19 14:57:00,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 14:57:00,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:57:00,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:57:00,910 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) [2022-07-19 14:57:00,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 14:57:00,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 14:57:00,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:57:00,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 14:57:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:57:01,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-19 14:57:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 14:57:01,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:57:01,333 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-07-19 14:57:01,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-07-19 14:57:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 14:57:01,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669949972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:57:01,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:57:01,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 9] total 33 [2022-07-19 14:57:01,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074454201] [2022-07-19 14:57:01,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:57:01,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 14:57:01,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:57:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 14:57:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 14:57:01,374 INFO L87 Difference]: Start difference. First operand 463 states and 585 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 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) [2022-07-19 14:57:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:57:03,167 INFO L93 Difference]: Finished difference Result 1431 states and 1850 transitions. [2022-07-19 14:57:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 14:57:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 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 57 [2022-07-19 14:57:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:57:03,172 INFO L225 Difference]: With dead ends: 1431 [2022-07-19 14:57:03,172 INFO L226 Difference]: Without dead ends: 1427 [2022-07-19 14:57:03,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=579, Invalid=2727, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 14:57:03,174 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 609 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 14:57:03,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 321 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 14:57:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-07-19 14:57:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 481. [2022-07-19 14:57:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.25625) internal successors, (603), 480 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:57:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 603 transitions. [2022-07-19 14:57:03,333 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 603 transitions. Word has length 57 [2022-07-19 14:57:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:57:03,333 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 603 transitions. [2022-07-19 14:57:03,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 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) [2022-07-19 14:57:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 603 transitions. [2022-07-19 14:57:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 14:57:03,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:57:03,334 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:57:03,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-19 14:57:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:57:03,535 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:57:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:57:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -793949111, now seen corresponding path program 4 times [2022-07-19 14:57:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:57:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040817019] [2022-07-19 14:57:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:57:03,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:57:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:57:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 14:57:03,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:57:03,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040817019] [2022-07-19 14:57:03,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040817019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:57:03,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035549819] [2022-07-19 14:57:03,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 14:57:03,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:57:03,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:57:03,632 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) [2022-07-19 14:57:03,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 14:57:03,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 14:57:03,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:57:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 14:57:03,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:57:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 14:57:03,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:57:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-19 14:57:04,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035549819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:57:04,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:57:04,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 23 [2022-07-19 14:57:04,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101919618] [2022-07-19 14:57:04,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:57:04,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 14:57:04,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:57:04,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 14:57:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-07-19 14:57:04,045 INFO L87 Difference]: Start difference. First operand 481 states and 603 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2022-07-19 14:57:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:57:09,854 INFO L93 Difference]: Finished difference Result 4679 states and 6242 transitions. [2022-07-19 14:57:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-19 14:57:09,855 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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 58 [2022-07-19 14:57:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:57:09,867 INFO L225 Difference]: With dead ends: 4679 [2022-07-19 14:57:09,867 INFO L226 Difference]: Without dead ends: 4235 [2022-07-19 14:57:09,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4137 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1811, Invalid=9109, Unknown=0, NotChecked=0, Total=10920 [2022-07-19 14:57:09,871 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1233 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 14:57:09,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 703 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 14:57:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2022-07-19 14:57:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 1169. [2022-07-19 14:57:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 1.268835616438356) internal successors, (1482), 1168 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:57:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1482 transitions. [2022-07-19 14:57:10,359 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1482 transitions. Word has length 58 [2022-07-19 14:57:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:57:10,359 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1482 transitions. [2022-07-19 14:57:10,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2022-07-19 14:57:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1482 transitions. [2022-07-19 14:57:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 14:57:10,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:57:10,361 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:57:10,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-19 14:57:10,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 14:57:10,563 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:57:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:57:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash 168090165, now seen corresponding path program 5 times [2022-07-19 14:57:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:57:10,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653977877] [2022-07-19 14:57:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:57:10,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:57:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:57:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 14:57:10,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:57:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653977877] [2022-07-19 14:57:10,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653977877] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:57:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822342375] [2022-07-19 14:57:10,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 14:57:10,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:57:10,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:57:10,709 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) [2022-07-19 14:57:10,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 14:57:12,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-19 14:57:12,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:57:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 14:57:12,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:57:12,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 42 [2022-07-19 14:57:12,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2022-07-19 14:57:13,160 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-19 14:57:13,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2022-07-19 14:57:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 14:57:13,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:57:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 14:57:14,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822342375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:57:14,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:57:14,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 15] total 40 [2022-07-19 14:57:14,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302403428] [2022-07-19 14:57:14,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:57:14,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 14:57:14,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:57:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 14:57:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1355, Unknown=2, NotChecked=0, Total=1560 [2022-07-19 14:57:14,705 INFO L87 Difference]: Start difference. First operand 1169 states and 1482 transitions. Second operand has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 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) [2022-07-19 14:57:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:57:26,458 INFO L93 Difference]: Finished difference Result 4199 states and 5665 transitions. [2022-07-19 14:57:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-19 14:57:26,458 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 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 66 [2022-07-19 14:57:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:57:26,469 INFO L225 Difference]: With dead ends: 4199 [2022-07-19 14:57:26,469 INFO L226 Difference]: Without dead ends: 4120 [2022-07-19 14:57:26,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 113 SyntacticMatches, 19 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6028 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1715, Invalid=15575, Unknown=2, NotChecked=0, Total=17292 [2022-07-19 14:57:26,475 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 685 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 3480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 14:57:26,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 2262 Invalid, 3480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2796 Invalid, 0 Unknown, 508 Unchecked, 1.6s Time] [2022-07-19 14:57:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2022-07-19 14:57:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 1379. [2022-07-19 14:57:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 1.2917271407837445) internal successors, (1780), 1378 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:57:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1780 transitions. [2022-07-19 14:57:27,190 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1780 transitions. Word has length 66 [2022-07-19 14:57:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:57:27,190 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 1780 transitions. [2022-07-19 14:57:27,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 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) [2022-07-19 14:57:27,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1780 transitions. [2022-07-19 14:57:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 14:57:27,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:57:27,193 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:57:27,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 14:57:27,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 14:57:27,399 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:57:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:57:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 6 times [2022-07-19 14:57:27,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:57:27,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925348283] [2022-07-19 14:57:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:57:27,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:57:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:57:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 14:57:28,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:57:28,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925348283] [2022-07-19 14:57:28,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925348283] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:57:28,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576591116] [2022-07-19 14:57:28,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 14:57:28,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:57:28,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:57:28,569 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) [2022-07-19 14:57:28,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 14:57:28,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 14:57:28,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:57:28,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 14:57:28,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:57:28,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 14:57:28,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 14:57:28,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 14:57:28,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 14:57:28,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 14:57:28,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 14:57:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 14:57:29,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:57:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 14:57:30,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576591116] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:57:30,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:57:30,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 43 [2022-07-19 14:57:30,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581871544] [2022-07-19 14:57:30,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:57:30,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 14:57:30,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:57:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 14:57:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 14:57:30,610 INFO L87 Difference]: Start difference. First operand 1379 states and 1780 transitions. Second operand has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 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) [2022-07-19 14:57:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:57:34,497 INFO L93 Difference]: Finished difference Result 3824 states and 5012 transitions. [2022-07-19 14:57:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-19 14:57:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 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 67 [2022-07-19 14:57:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:57:34,504 INFO L225 Difference]: With dead ends: 3824 [2022-07-19 14:57:34,505 INFO L226 Difference]: Without dead ends: 3171 [2022-07-19 14:57:34,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2022-07-19 14:57:34,506 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 447 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 14:57:34,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 736 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 660 Invalid, 0 Unknown, 752 Unchecked, 0.4s Time] [2022-07-19 14:57:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2022-07-19 14:57:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2522. [2022-07-19 14:57:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 1.2963109877032923) internal successors, (3268), 2521 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:57:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3268 transitions. [2022-07-19 14:57:35,582 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3268 transitions. Word has length 67 [2022-07-19 14:57:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:57:35,582 INFO L495 AbstractCegarLoop]: Abstraction has 2522 states and 3268 transitions. [2022-07-19 14:57:35,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 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) [2022-07-19 14:57:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3268 transitions. [2022-07-19 14:57:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 14:57:35,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:57:35,587 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:57:35,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 14:57:35,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:57:35,811 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:57:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:57:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1374970291, now seen corresponding path program 7 times [2022-07-19 14:57:35,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:57:35,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053886928] [2022-07-19 14:57:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:57:35,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:57:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:57:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-19 14:57:36,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:57:36,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053886928] [2022-07-19 14:57:36,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053886928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:57:36,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482271924] [2022-07-19 14:57:36,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 14:57:36,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:57:36,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:57:36,264 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) [2022-07-19 14:57:36,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 14:57:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:57:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-19 14:57:36,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:57:37,670 INFO L356 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-07-19 14:57:37,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-07-19 14:57:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-19 14:57:49,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:57:58,810 INFO L356 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2022-07-19 14:57:58,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 223 treesize of output 1 [2022-07-19 14:57:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-19 14:57:58,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482271924] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:57:58,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:57:58,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 13] total 31 [2022-07-19 14:57:58,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246240699] [2022-07-19 14:57:58,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:57:58,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 14:57:58,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:57:58,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 14:57:58,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-07-19 14:57:58,816 INFO L87 Difference]: Start difference. First operand 2522 states and 3268 transitions. Second operand has 31 states, 31 states have (on average 4.096774193548387) internal successors, (127), 31 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) [2022-07-19 14:58:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:58:06,727 INFO L93 Difference]: Finished difference Result 4721 states and 6237 transitions. [2022-07-19 14:58:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-19 14:58:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.096774193548387) internal successors, (127), 31 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 [2022-07-19 14:58:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:58:06,737 INFO L225 Difference]: With dead ends: 4721 [2022-07-19 14:58:06,737 INFO L226 Difference]: Without dead ends: 4401 [2022-07-19 14:58:06,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1711, Invalid=7409, Unknown=0, NotChecked=0, Total=9120 [2022-07-19 14:58:06,739 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 267 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 628 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:58:06,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 216 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 251 Invalid, 0 Unknown, 628 Unchecked, 0.2s Time] [2022-07-19 14:58:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2022-07-19 14:58:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 1571. [2022-07-19 14:58:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 1.2796178343949045) internal successors, (2009), 1570 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:58:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2009 transitions. [2022-07-19 14:58:07,530 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2009 transitions. Word has length 67 [2022-07-19 14:58:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:58:07,530 INFO L495 AbstractCegarLoop]: Abstraction has 1571 states and 2009 transitions. [2022-07-19 14:58:07,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.096774193548387) internal successors, (127), 31 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) [2022-07-19 14:58:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2009 transitions. [2022-07-19 14:58:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 14:58:07,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:58:07,533 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:58:07,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 14:58:07,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:58:07,747 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:58:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:58:07,748 INFO L85 PathProgramCache]: Analyzing trace with hash -436746483, now seen corresponding path program 8 times [2022-07-19 14:58:07,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:58:07,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720439373] [2022-07-19 14:58:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:58:07,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:58:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:58:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 14:58:09,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:58:09,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720439373] [2022-07-19 14:58:09,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720439373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:58:09,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630374207] [2022-07-19 14:58:09,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 14:58:09,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:58:09,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:58:09,210 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) [2022-07-19 14:58:09,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 14:58:09,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 14:58:09,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:58:09,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 14:58:09,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:58:09,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:58:09,826 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-07-19 14:58:09,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-07-19 14:58:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 14:58:09,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:58:10,347 INFO L356 Elim1Store]: treesize reduction 49, result has 72.0 percent of original size [2022-07-19 14:58:10,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 151 [2022-07-19 14:58:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 14:58:10,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630374207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:58:10,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:58:10,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 44 [2022-07-19 14:58:10,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494603227] [2022-07-19 14:58:10,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:58:10,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 14:58:10,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:58:10,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 14:58:10,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 14:58:10,654 INFO L87 Difference]: Start difference. First operand 1571 states and 2009 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 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) [2022-07-19 14:58:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:58:21,616 INFO L93 Difference]: Finished difference Result 4016 states and 5134 transitions. [2022-07-19 14:58:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-19 14:58:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 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 [2022-07-19 14:58:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:58:21,622 INFO L225 Difference]: With dead ends: 4016 [2022-07-19 14:58:21,622 INFO L226 Difference]: Without dead ends: 2428 [2022-07-19 14:58:21,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 115 SyntacticMatches, 30 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3802 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1321, Invalid=8381, Unknown=0, NotChecked=0, Total=9702 [2022-07-19 14:58:21,625 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 634 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:58:21,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 903 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1685 Invalid, 0 Unknown, 202 Unchecked, 1.1s Time] [2022-07-19 14:58:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-07-19 14:58:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1411. [2022-07-19 14:58:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 1.222695035460993) internal successors, (1724), 1410 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:58:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1724 transitions. [2022-07-19 14:58:22,280 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1724 transitions. Word has length 67 [2022-07-19 14:58:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:58:22,280 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 1724 transitions. [2022-07-19 14:58:22,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 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) [2022-07-19 14:58:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1724 transitions. [2022-07-19 14:58:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 14:58:22,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:58:22,282 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:58:22,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 14:58:22,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 14:58:22,507 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:58:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:58:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash 6687953, now seen corresponding path program 9 times [2022-07-19 14:58:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:58:22,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395229693] [2022-07-19 14:58:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:58:22,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:58:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:58:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 14:58:23,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:58:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395229693] [2022-07-19 14:58:23,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395229693] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:58:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467820997] [2022-07-19 14:58:23,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 14:58:23,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:58:23,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:58:23,796 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) [2022-07-19 14:58:23,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 14:58:24,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 14:58:24,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:58:24,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 14:58:24,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:58:24,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 14:58:24,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 14:58:24,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 14:58:24,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 14:58:24,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 14:58:24,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 42 [2022-07-19 14:58:24,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-19 14:58:24,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-07-19 14:58:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 14:58:24,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:58:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 18 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 14:58:25,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467820997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:58:25,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:58:25,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 40 [2022-07-19 14:58:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297527790] [2022-07-19 14:58:25,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:58:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 14:58:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:58:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 14:58:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 14:58:25,017 INFO L87 Difference]: Start difference. First operand 1411 states and 1724 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 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) [2022-07-19 14:58:29,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:58:29,751 INFO L93 Difference]: Finished difference Result 2958 states and 3698 transitions. [2022-07-19 14:58:29,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-19 14:58:29,752 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 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 [2022-07-19 14:58:29,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:58:29,758 INFO L225 Difference]: With dead ends: 2958 [2022-07-19 14:58:29,758 INFO L226 Difference]: Without dead ends: 2479 [2022-07-19 14:58:29,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1592, Invalid=8308, Unknown=0, NotChecked=0, Total=9900 [2022-07-19 14:58:29,760 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 716 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 14:58:29,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 612 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 14:58:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-07-19 14:58:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1646. [2022-07-19 14:58:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 1.2243161094224924) internal successors, (2014), 1645 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:58:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2014 transitions. [2022-07-19 14:58:30,552 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2014 transitions. Word has length 67 [2022-07-19 14:58:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:58:30,552 INFO L495 AbstractCegarLoop]: Abstraction has 1646 states and 2014 transitions. [2022-07-19 14:58:30,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 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) [2022-07-19 14:58:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2014 transitions. [2022-07-19 14:58:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 14:58:30,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:58:30,555 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:58:30,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 14:58:30,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 14:58:30,756 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:58:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:58:30,756 INFO L85 PathProgramCache]: Analyzing trace with hash -415204979, now seen corresponding path program 10 times [2022-07-19 14:58:30,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:58:30,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391369520] [2022-07-19 14:58:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:58:30,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:58:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:58:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 14:58:32,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:58:32,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391369520] [2022-07-19 14:58:32,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391369520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:58:32,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823070754] [2022-07-19 14:58:32,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 14:58:32,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:58:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:58:32,175 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) [2022-07-19 14:58:32,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 14:58:32,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 14:58:32,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:58:32,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 14:58:32,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:58:32,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:58:32,755 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-19 14:58:32,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 18 [2022-07-19 14:58:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 14:58:32,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:58:33,245 INFO L356 Elim1Store]: treesize reduction 56, result has 68.0 percent of original size [2022-07-19 14:58:33,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 143 [2022-07-19 14:58:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 14:58:33,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823070754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:58:33,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:58:33,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 44 [2022-07-19 14:58:33,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479080251] [2022-07-19 14:58:33,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:58:33,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 14:58:33,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:58:33,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 14:58:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 14:58:33,637 INFO L87 Difference]: Start difference. First operand 1646 states and 2014 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 44 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) [2022-07-19 14:58:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:58:43,492 INFO L93 Difference]: Finished difference Result 3378 states and 4195 transitions. [2022-07-19 14:58:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-19 14:58:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 44 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 [2022-07-19 14:58:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:58:43,499 INFO L225 Difference]: With dead ends: 3378 [2022-07-19 14:58:43,499 INFO L226 Difference]: Without dead ends: 2943 [2022-07-19 14:58:43,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 113 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1233, Invalid=7697, Unknown=0, NotChecked=0, Total=8930 [2022-07-19 14:58:43,501 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 952 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 14:58:43,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [952 Valid, 637 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1270 Invalid, 0 Unknown, 206 Unchecked, 0.9s Time] [2022-07-19 14:58:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2943 states. [2022-07-19 14:58:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2943 to 1595. [2022-07-19 14:58:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 1.2164366373902133) internal successors, (1939), 1594 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:58:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 1939 transitions. [2022-07-19 14:58:44,273 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 1939 transitions. Word has length 67 [2022-07-19 14:58:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:58:44,273 INFO L495 AbstractCegarLoop]: Abstraction has 1595 states and 1939 transitions. [2022-07-19 14:58:44,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 44 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) [2022-07-19 14:58:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 1939 transitions. [2022-07-19 14:58:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 14:58:44,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:58:44,276 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:58:44,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 14:58:44,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 14:58:44,491 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:58:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:58:44,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1765343351, now seen corresponding path program 11 times [2022-07-19 14:58:44,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:58:44,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373953130] [2022-07-19 14:58:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:58:44,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:58:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:58:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-19 14:58:44,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:58:44,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373953130] [2022-07-19 14:58:44,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373953130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:58:44,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58059950] [2022-07-19 14:58:44,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 14:58:44,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:58:44,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:58:44,612 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) [2022-07-19 14:58:44,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 14:58:45,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-19 14:58:45,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:58:45,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 14:58:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:58:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-19 14:58:45,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:58:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-19 14:58:45,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58059950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:58:45,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:58:45,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-19 14:58:45,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835378507] [2022-07-19 14:58:45,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:58:45,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 14:58:45,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:58:45,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 14:58:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-19 14:58:45,826 INFO L87 Difference]: Start difference. First operand 1595 states and 1939 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:58:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:58:47,165 INFO L93 Difference]: Finished difference Result 2900 states and 3656 transitions. [2022-07-19 14:58:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 14:58:47,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 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 76 [2022-07-19 14:58:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:58:47,170 INFO L225 Difference]: With dead ends: 2900 [2022-07-19 14:58:47,170 INFO L226 Difference]: Without dead ends: 2135 [2022-07-19 14:58:47,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-07-19 14:58:47,171 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 274 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:58:47,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 380 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 14:58:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2022-07-19 14:58:47,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1228. [2022-07-19 14:58:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 1.2485737571312143) internal successors, (1532), 1227 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:58:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1532 transitions. [2022-07-19 14:58:47,794 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1532 transitions. Word has length 76 [2022-07-19 14:58:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:58:47,794 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 1532 transitions. [2022-07-19 14:58:47,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:58:47,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1532 transitions. [2022-07-19 14:58:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 14:58:47,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:58:47,798 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:58:47,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 14:58:48,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 14:58:48,004 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:58:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:58:48,005 INFO L85 PathProgramCache]: Analyzing trace with hash -100514461, now seen corresponding path program 12 times [2022-07-19 14:58:48,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:58:48,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569430157] [2022-07-19 14:58:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:58:48,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:58:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:58:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 14:58:48,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:58:48,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569430157] [2022-07-19 14:58:48,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569430157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:58:48,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778039682] [2022-07-19 14:58:48,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 14:58:48,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:58:48,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:58:48,534 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) [2022-07-19 14:58:48,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 14:58:48,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 14:58:48,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:58:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 14:58:48,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:58:49,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:58:49,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:58:49,205 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:58:49,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 27 [2022-07-19 14:58:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 14:58:49,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:58:49,596 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-07-19 14:58:49,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-07-19 14:58:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-19 14:58:49,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778039682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:58:49,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:58:49,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 15] total 32 [2022-07-19 14:58:49,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865145369] [2022-07-19 14:58:49,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:58:49,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 14:58:49,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:58:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 14:58:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2022-07-19 14:58:49,658 INFO L87 Difference]: Start difference. First operand 1228 states and 1532 transitions. Second operand has 32 states, 32 states have (on average 3.875) internal successors, (124), 32 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) [2022-07-19 14:58:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:58:54,684 INFO L93 Difference]: Finished difference Result 5582 states and 6989 transitions. [2022-07-19 14:58:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 14:58:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.875) internal successors, (124), 32 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 77 [2022-07-19 14:58:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:58:54,691 INFO L225 Difference]: With dead ends: 5582 [2022-07-19 14:58:54,691 INFO L226 Difference]: Without dead ends: 4902 [2022-07-19 14:58:54,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1144, Invalid=3548, Unknown=0, NotChecked=0, Total=4692 [2022-07-19 14:58:54,692 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1341 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 14:58:54,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1341 Valid, 504 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 14:58:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4902 states. [2022-07-19 14:58:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4902 to 1210. [2022-07-19 14:58:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 1.2514474772539288) internal successors, (1513), 1209 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:58:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1513 transitions. [2022-07-19 14:58:55,346 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1513 transitions. Word has length 77 [2022-07-19 14:58:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:58:55,346 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 1513 transitions. [2022-07-19 14:58:55,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.875) internal successors, (124), 32 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) [2022-07-19 14:58:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1513 transitions. [2022-07-19 14:58:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 14:58:55,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:58:55,348 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:58:55,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 14:58:55,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:58:55,549 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:58:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:58:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1514679456, now seen corresponding path program 13 times [2022-07-19 14:58:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:58:55,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882814103] [2022-07-19 14:58:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:58:55,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:58:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:58:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-19 14:58:55,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:58:55,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882814103] [2022-07-19 14:58:55,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882814103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:58:55,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855888372] [2022-07-19 14:58:55,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 14:58:55,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:58:55,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:58:55,716 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) [2022-07-19 14:58:55,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 14:58:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:58:55,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 14:58:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:58:56,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:58:56,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:58:56,938 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-19 14:58:56,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 20 [2022-07-19 14:58:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-19 14:58:56,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:58:58,737 INFO L356 Elim1Store]: treesize reduction 75, result has 1.3 percent of original size [2022-07-19 14:58:58,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 1 [2022-07-19 14:58:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 61 proven. 9 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-19 14:58:58,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855888372] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:58:58,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:58:58,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 19] total 48 [2022-07-19 14:58:58,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65714943] [2022-07-19 14:58:58,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:58:58,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 14:58:58,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:58:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 14:58:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1933, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 14:58:58,742 INFO L87 Difference]: Start difference. First operand 1210 states and 1513 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 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) [2022-07-19 14:59:07,427 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 76 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 14:59:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:59:08,088 INFO L93 Difference]: Finished difference Result 1976 states and 2494 transitions. [2022-07-19 14:59:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-19 14:59:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 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 78 [2022-07-19 14:59:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:59:08,091 INFO L225 Difference]: With dead ends: 1976 [2022-07-19 14:59:08,091 INFO L226 Difference]: Without dead ends: 1826 [2022-07-19 14:59:08,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=917, Invalid=7825, Unknown=0, NotChecked=0, Total=8742 [2022-07-19 14:59:08,093 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 266 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 14:59:08,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 835 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 694 Invalid, 0 Unknown, 375 Unchecked, 0.3s Time] [2022-07-19 14:59:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-07-19 14:59:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1235. [2022-07-19 14:59:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 1.2487844408427877) internal successors, (1541), 1234 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:59:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1541 transitions. [2022-07-19 14:59:08,746 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1541 transitions. Word has length 78 [2022-07-19 14:59:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:59:08,747 INFO L495 AbstractCegarLoop]: Abstraction has 1235 states and 1541 transitions. [2022-07-19 14:59:08,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 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) [2022-07-19 14:59:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1541 transitions. [2022-07-19 14:59:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 14:59:08,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:59:08,749 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:59:08,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-19 14:59:08,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:59:08,952 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:59:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:59:08,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1794665161, now seen corresponding path program 14 times [2022-07-19 14:59:08,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:59:08,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464947931] [2022-07-19 14:59:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:59:08,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:59:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:59:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-19 14:59:09,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:59:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464947931] [2022-07-19 14:59:09,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464947931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:59:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306723895] [2022-07-19 14:59:09,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 14:59:09,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:59:09,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:59:09,137 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) [2022-07-19 14:59:09,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 14:59:09,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 14:59:09,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:59:09,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 14:59:09,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:59:09,435 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-19 14:59:09,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 35 [2022-07-19 14:59:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-07-19 14:59:09,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:59:09,861 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-07-19 14:59:09,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-07-19 14:59:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-07-19 14:59:09,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306723895] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:59:09,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:59:09,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 36 [2022-07-19 14:59:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120360133] [2022-07-19 14:59:09,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:59:09,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 14:59:09,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:59:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 14:59:09,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 14:59:09,910 INFO L87 Difference]: Start difference. First operand 1235 states and 1541 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 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) [2022-07-19 14:59:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:59:19,969 INFO L93 Difference]: Finished difference Result 12430 states and 16128 transitions. [2022-07-19 14:59:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-19 14:59:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 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 80 [2022-07-19 14:59:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:59:19,988 INFO L225 Difference]: With dead ends: 12430 [2022-07-19 14:59:19,988 INFO L226 Difference]: Without dead ends: 11752 [2022-07-19 14:59:19,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3518 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1777, Invalid=10655, Unknown=0, NotChecked=0, Total=12432 [2022-07-19 14:59:19,992 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 2349 mSDsluCounter, 2626 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2349 SdHoareTripleChecker+Valid, 2792 SdHoareTripleChecker+Invalid, 3199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 14:59:19,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2349 Valid, 2792 Invalid, 3199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 2645 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 14:59:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11752 states. [2022-07-19 14:59:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11752 to 1297. [2022-07-19 14:59:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 1.2438271604938271) internal successors, (1612), 1296 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:59:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1612 transitions. [2022-07-19 14:59:20,882 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1612 transitions. Word has length 80 [2022-07-19 14:59:20,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:59:20,882 INFO L495 AbstractCegarLoop]: Abstraction has 1297 states and 1612 transitions. [2022-07-19 14:59:20,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 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) [2022-07-19 14:59:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1612 transitions. [2022-07-19 14:59:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-19 14:59:20,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:59:20,884 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:59:20,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-19 14:59:21,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-19 14:59:21,085 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:59:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:59:21,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1839805964, now seen corresponding path program 15 times [2022-07-19 14:59:21,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:59:21,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606631747] [2022-07-19 14:59:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:59:21,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:59:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:59:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 14:59:21,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:59:21,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606631747] [2022-07-19 14:59:21,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606631747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:59:21,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076749967] [2022-07-19 14:59:21,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 14:59:21,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:59:21,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:59:21,324 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) [2022-07-19 14:59:21,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 14:59:21,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 14:59:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:59:21,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 14:59:21,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:59:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 14:59:22,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:59:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 14:59:22,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076749967] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:59:22,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:59:22,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-07-19 14:59:22,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362684939] [2022-07-19 14:59:22,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:59:22,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 14:59:22,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:59:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 14:59:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-07-19 14:59:22,359 INFO L87 Difference]: Start difference. First operand 1297 states and 1612 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 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) [2022-07-19 14:59:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:59:24,326 INFO L93 Difference]: Finished difference Result 2624 states and 3317 transitions. [2022-07-19 14:59:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 14:59:24,327 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 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 88 [2022-07-19 14:59:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:59:24,331 INFO L225 Difference]: With dead ends: 2624 [2022-07-19 14:59:24,332 INFO L226 Difference]: Without dead ends: 2620 [2022-07-19 14:59:24,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-07-19 14:59:24,333 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 236 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:59:24,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1729 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 14:59:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2022-07-19 14:59:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 1649. [2022-07-19 14:59:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 1.2512135922330097) internal successors, (2062), 1648 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:59:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2062 transitions. [2022-07-19 14:59:25,533 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2062 transitions. Word has length 88 [2022-07-19 14:59:25,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:59:25,534 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2062 transitions. [2022-07-19 14:59:25,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 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) [2022-07-19 14:59:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2062 transitions. [2022-07-19 14:59:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-19 14:59:25,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:59:25,536 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:59:25,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-19 14:59:25,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:59:25,736 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:59:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:59:25,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1581640526, now seen corresponding path program 16 times [2022-07-19 14:59:25,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:59:25,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160053283] [2022-07-19 14:59:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:59:25,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:59:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:59:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 14:59:27,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:59:27,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160053283] [2022-07-19 14:59:27,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160053283] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:59:27,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188080273] [2022-07-19 14:59:27,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 14:59:27,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:59:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:59:27,206 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) [2022-07-19 14:59:27,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-19 14:59:27,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 14:59:27,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:59:27,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 14:59:27,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:59:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:59:27,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:59:27,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:59:27,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:59:27,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:59:27,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:59:27,965 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:59:27,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 33 [2022-07-19 14:59:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 104 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 14:59:27,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:59:28,439 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-07-19 14:59:28,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-07-19 14:59:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-19 14:59:28,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188080273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:59:28,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:59:28,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 14] total 43 [2022-07-19 14:59:28,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329268263] [2022-07-19 14:59:28,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:59:28,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 14:59:28,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:59:28,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 14:59:28,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 14:59:28,759 INFO L87 Difference]: Start difference. First operand 1649 states and 2062 transitions. Second operand has 43 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 43 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) [2022-07-19 14:59:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:59:37,595 INFO L93 Difference]: Finished difference Result 8517 states and 11056 transitions. [2022-07-19 14:59:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-19 14:59:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 43 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 88 [2022-07-19 14:59:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:59:37,606 INFO L225 Difference]: With dead ends: 8517 [2022-07-19 14:59:37,606 INFO L226 Difference]: Without dead ends: 7399 [2022-07-19 14:59:37,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1070, Invalid=7860, Unknown=0, NotChecked=0, Total=8930 [2022-07-19 14:59:37,609 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 817 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:59:37,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 834 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 14:59:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2022-07-19 14:59:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 3097. [2022-07-19 14:59:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 3096 states have (on average 1.2852067183462532) internal successors, (3979), 3096 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:59:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3979 transitions. [2022-07-19 14:59:39,673 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3979 transitions. Word has length 88 [2022-07-19 14:59:39,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:59:39,673 INFO L495 AbstractCegarLoop]: Abstraction has 3097 states and 3979 transitions. [2022-07-19 14:59:39,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 43 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) [2022-07-19 14:59:39,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3979 transitions. [2022-07-19 14:59:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-19 14:59:39,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:59:39,676 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:59:39,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-19 14:59:39,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:59:39,877 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:59:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:59:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash 240292206, now seen corresponding path program 17 times [2022-07-19 14:59:39,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:59:39,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842025689] [2022-07-19 14:59:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:59:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:59:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:59:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 14:59:41,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:59:41,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842025689] [2022-07-19 14:59:41,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842025689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:59:41,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311574187] [2022-07-19 14:59:41,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 14:59:41,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:59:41,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:59:41,593 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) [2022-07-19 14:59:41,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-19 14:59:43,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-19 14:59:43,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:59:43,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-19 14:59:43,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:59:44,763 INFO L356 Elim1Store]: treesize reduction 194, result has 16.7 percent of original size [2022-07-19 14:59:44,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 55 [2022-07-19 14:59:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 22 proven. 154 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 14:59:44,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:59:50,513 INFO L356 Elim1Store]: treesize reduction 452, result has 32.4 percent of original size [2022-07-19 14:59:50,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 151 treesize of output 271 [2022-07-19 14:59:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 111 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 14:59:51,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311574187] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:59:51,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:59:51,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29, 29] total 77 [2022-07-19 14:59:51,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74083611] [2022-07-19 14:59:51,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:59:51,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-19 14:59:51,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:59:51,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-19 14:59:51,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=5072, Unknown=0, NotChecked=0, Total=5852 [2022-07-19 14:59:51,494 INFO L87 Difference]: Start difference. First operand 3097 states and 3979 transitions. Second operand has 77 states, 77 states have (on average 2.5974025974025974) internal successors, (200), 77 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)