./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mlceu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/mlceu.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:55:24,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:55:24,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:55:24,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:55:24,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:55:24,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:55:24,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:55:24,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:55:24,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:55:24,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:55:24,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:55:24,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:55:24,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:55:24,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:55:24,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:55:24,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:55:24,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:55:24,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:55:24,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:55:24,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:55:24,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:55:24,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:55:24,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:55:24,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:55:24,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:55:24,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:55:24,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:55:24,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:55:24,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:55:24,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:55:24,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:55:24,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:55:24,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:55:24,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:55:24,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:55:24,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:55:24,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:55:24,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:55:24,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:55:24,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:55:24,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:55:24,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:55:24,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:55:24,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:55:24,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:55:24,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:55:24,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:55:24,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:55:24,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:55:24,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:55:24,309 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:55:24,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:55:24,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:55:24,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:55:24,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:55:24,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:55:24,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:55:24,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:55:24,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:55:24,310 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:55:24,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:55:24,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:55:24,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:55:24,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:55:24,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:55:24,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:55:24,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:55:24,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:55:24,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:55:24,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:55:24,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:55:24,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:55:24,313 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:55:24,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:55:24,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:55:24,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:55:24,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2021-12-21 09:55:24,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:55:24,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:55:24,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:55:24,545 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:55:24,545 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:55:24,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu.c [2021-12-21 09:55:24,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64ef53673/7fc8a4ce4f2e42a5b8d2bbeb51f5c9a2/FLAG924b856ce [2021-12-21 09:55:24,906 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:55:24,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c [2021-12-21 09:55:24,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64ef53673/7fc8a4ce4f2e42a5b8d2bbeb51f5c9a2/FLAG924b856ce [2021-12-21 09:55:24,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64ef53673/7fc8a4ce4f2e42a5b8d2bbeb51f5c9a2 [2021-12-21 09:55:24,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:55:24,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:55:24,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:55:24,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:55:24,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:55:24,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:24" (1/1) ... [2021-12-21 09:55:24,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e15061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:24, skipping insertion in model container [2021-12-21 09:55:24,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:24" (1/1) ... [2021-12-21 09:55:24,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:55:24,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:55:25,058 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/array-tiling/mlceu.c[396,409] [2021-12-21 09:55:25,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:55:25,072 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:55:25,080 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/array-tiling/mlceu.c[396,409] [2021-12-21 09:55:25,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:55:25,091 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:55:25,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25 WrapperNode [2021-12-21 09:55:25,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:55:25,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:55:25,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:55:25,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:55:25,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,117 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-12-21 09:55:25,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:55:25,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:55:25,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:55:25,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:55:25,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:55:25,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:55:25,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:55:25,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:55:25,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:55:25,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:25,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 09:55:25,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 09:55:25,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:55:25,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:55:25,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:55:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 09:55:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:55:25,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:55:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:55:25,257 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:55:25,258 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:55:25,382 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:55:25,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:55:25,399 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 09:55:25,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:25 BoogieIcfgContainer [2021-12-21 09:55:25,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:55:25,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:55:25,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:55:25,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:55:25,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:55:24" (1/3) ... [2021-12-21 09:55:25,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32795fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:55:25, skipping insertion in model container [2021-12-21 09:55:25,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25" (2/3) ... [2021-12-21 09:55:25,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32795fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:55:25, skipping insertion in model container [2021-12-21 09:55:25,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:25" (3/3) ... [2021-12-21 09:55:25,407 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu.c [2021-12-21 09:55:25,410 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:55:25,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:55:25,479 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:55:25,488 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 09:55:25,489 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:55:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) [2021-12-21 09:55:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 09:55:25,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:25,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:25,512 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:25,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1096717866, now seen corresponding path program 1 times [2021-12-21 09:55:25,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:25,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158843696] [2021-12-21 09:55:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:25,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:25,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:25,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158843696] [2021-12-21 09:55:25,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158843696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:25,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:25,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 09:55:25,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450172028] [2021-12-21 09:55:25,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:25,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 09:55:25,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 09:55:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 09:55:25,682 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:25,692 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-12-21 09:55:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 09:55:25,695 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 09:55:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:25,700 INFO L225 Difference]: With dead ends: 34 [2021-12-21 09:55:25,700 INFO L226 Difference]: Without dead ends: 15 [2021-12-21 09:55:25,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 09:55:25,708 INFO L933 BasicCegarLoop]: 22 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, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:25,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-21 09:55:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-21 09:55:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-12-21 09:55:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-21 09:55:25,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2021-12-21 09:55:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:25,734 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-21 09:55:25,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-21 09:55:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 09:55:25,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:25,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:25,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:55:25,737 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash 678289496, now seen corresponding path program 1 times [2021-12-21 09:55:25,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:25,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069090460] [2021-12-21 09:55:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:25,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:25,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:25,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069090460] [2021-12-21 09:55:25,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069090460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:25,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:25,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 09:55:25,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571793248] [2021-12-21 09:55:25,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:25,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 09:55:25,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 09:55:25,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 09:55:25,796 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:25,840 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-21 09:55:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 09:55:25,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 09:55:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:25,843 INFO L225 Difference]: With dead ends: 34 [2021-12-21 09:55:25,843 INFO L226 Difference]: Without dead ends: 24 [2021-12-21 09:55:25,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 09:55:25,844 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:25,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-21 09:55:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2021-12-21 09:55:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-21 09:55:25,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-12-21 09:55:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:25,849 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-21 09:55:25,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-21 09:55:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 09:55:25,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:25,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:25,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 09:55:25,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1190752748, now seen corresponding path program 1 times [2021-12-21 09:55:25,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95933434] [2021-12-21 09:55:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:25,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:25,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95933434] [2021-12-21 09:55:25,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95933434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852983934] [2021-12-21 09:55:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:25,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:25,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:25,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:25,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:55:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 09:55:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:26,124 INFO L387 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 18 treesize of output 14 [2021-12-21 09:55:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:26,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:26,319 INFO L387 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 14 treesize of output 12 [2021-12-21 09:55:26,322 INFO L387 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 22 treesize of output 20 [2021-12-21 09:55:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:26,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852983934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:26,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:26,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-21 09:55:26,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508570673] [2021-12-21 09:55:26,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:26,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 09:55:26,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:26,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 09:55:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 09:55:26,336 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:26,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:26,435 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-12-21 09:55:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 09:55:26,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 13 [2021-12-21 09:55:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:26,438 INFO L225 Difference]: With dead ends: 26 [2021-12-21 09:55:26,438 INFO L226 Difference]: Without dead ends: 24 [2021-12-21 09:55:26,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-12-21 09:55:26,444 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:26,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-21 09:55:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-12-21 09:55:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-21 09:55:26,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-12-21 09:55:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:26,454 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-21 09:55:26,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-21 09:55:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 09:55:26,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:26,455 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:26,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 09:55:26,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:26,673 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:26,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1891500962, now seen corresponding path program 1 times [2021-12-21 09:55:26,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:26,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441002293] [2021-12-21 09:55:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:26,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:26,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:26,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441002293] [2021-12-21 09:55:26,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441002293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552232267] [2021-12-21 09:55:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:26,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:26,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:26,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:26,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:55:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:55:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:26,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:26,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552232267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:26,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:26,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 09:55:26,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288662309] [2021-12-21 09:55:26,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:26,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 09:55:26,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:26,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 09:55:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 09:55:26,917 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:26,970 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-12-21 09:55:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 09:55:26,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-21 09:55:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:26,971 INFO L225 Difference]: With dead ends: 49 [2021-12-21 09:55:26,971 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 09:55:26,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:55:26,973 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:26,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 09:55:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2021-12-21 09:55:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-21 09:55:26,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2021-12-21 09:55:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:26,976 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-21 09:55:26,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-21 09:55:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 09:55:26,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:26,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:26,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:27,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 09:55:27,191 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2006236274, now seen corresponding path program 2 times [2021-12-21 09:55:27,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:27,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118735511] [2021-12-21 09:55:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:27,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:27,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:27,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118735511] [2021-12-21 09:55:27,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118735511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:27,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241006828] [2021-12-21 09:55:27,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:55:27,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:27,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:27,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:55:27,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:55:27,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 09:55:27,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:27,346 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:27,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:27,471 INFO L387 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 14 [2021-12-21 09:55:27,473 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:27,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241006828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:27,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:27,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2021-12-21 09:55:27,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832980770] [2021-12-21 09:55:27,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:27,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 09:55:27,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 09:55:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 09:55:27,496 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:27,620 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-21 09:55:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 09:55:27,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 09:55:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:27,621 INFO L225 Difference]: With dead ends: 33 [2021-12-21 09:55:27,621 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 09:55:27,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-21 09:55:27,622 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:27,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:55:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 09:55:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-21 09:55:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-12-21 09:55:27,626 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2021-12-21 09:55:27,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:27,626 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-12-21 09:55:27,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,626 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-12-21 09:55:27,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 09:55:27,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:27,626 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:27,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:27,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:27,840 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:27,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:27,840 INFO L85 PathProgramCache]: Analyzing trace with hash 466236484, now seen corresponding path program 3 times [2021-12-21 09:55:27,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:27,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250060073] [2021-12-21 09:55:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:27,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:27,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:27,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250060073] [2021-12-21 09:55:27,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250060073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:27,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738954772] [2021-12-21 09:55:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:55:27,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:27,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:27,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:27,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:55:27,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 09:55:27,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:27,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 09:55:27,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:28,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:28,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738954772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:28,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:28,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 09:55:28,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739335097] [2021-12-21 09:55:28,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:28,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 09:55:28,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 09:55:28,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-21 09:55:28,078 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:28,145 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-12-21 09:55:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 09:55:28,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 09:55:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:28,146 INFO L225 Difference]: With dead ends: 64 [2021-12-21 09:55:28,146 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 09:55:28,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-21 09:55:28,149 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:28,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 09:55:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-12-21 09:55:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-21 09:55:28,157 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-12-21 09:55:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:28,157 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-21 09:55:28,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-21 09:55:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 09:55:28,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:28,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:28,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:28,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:28,376 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1524796712, now seen corresponding path program 4 times [2021-12-21 09:55:28,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:28,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396217485] [2021-12-21 09:55:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:28,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:28,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:28,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396217485] [2021-12-21 09:55:28,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396217485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960981811] [2021-12-21 09:55:28,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:55:28,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:28,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:28,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:28,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 09:55:28,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:55:28,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:28,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 09:55:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:28,625 INFO L387 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 13 treesize of output 9 [2021-12-21 09:55:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:28,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:28,808 INFO L387 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 14 [2021-12-21 09:55:28,810 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:28,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960981811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:28,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:28,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-21 09:55:28,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602898623] [2021-12-21 09:55:28,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:28,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 09:55:28,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 09:55:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-21 09:55:28,837 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:29,024 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-21 09:55:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 09:55:29,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 09:55:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:29,026 INFO L225 Difference]: With dead ends: 40 [2021-12-21 09:55:29,026 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 09:55:29,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-12-21 09:55:29,027 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:29,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 101 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:55:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 09:55:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-12-21 09:55:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-21 09:55:29,030 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2021-12-21 09:55:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:29,031 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-21 09:55:29,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-21 09:55:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 09:55:29,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:29,032 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:29,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 09:55:29,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:29,249 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 702525070, now seen corresponding path program 5 times [2021-12-21 09:55:29,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:29,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994198651] [2021-12-21 09:55:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:29,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:29,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:29,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994198651] [2021-12-21 09:55:29,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994198651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:29,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253071576] [2021-12-21 09:55:29,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:55:29,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:29,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:29,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:29,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 09:55:29,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 09:55:29,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:29,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 09:55:29,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:29,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:29,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253071576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:29,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:29,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-21 09:55:29,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882738773] [2021-12-21 09:55:29,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:29,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 09:55:29,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 09:55:29,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-21 09:55:29,538 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:29,609 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-12-21 09:55:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 09:55:29,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-21 09:55:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:29,612 INFO L225 Difference]: With dead ends: 79 [2021-12-21 09:55:29,612 INFO L226 Difference]: Without dead ends: 45 [2021-12-21 09:55:29,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-21 09:55:29,613 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:29,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 63 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-21 09:55:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-12-21 09:55:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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) [2021-12-21 09:55:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-21 09:55:29,623 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2021-12-21 09:55:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:29,625 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-21 09:55:29,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-21 09:55:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 09:55:29,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:29,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:29,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:29,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:29,828 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:29,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1539792518, now seen corresponding path program 6 times [2021-12-21 09:55:29,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:29,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565044672] [2021-12-21 09:55:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:29,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:30,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:30,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565044672] [2021-12-21 09:55:30,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565044672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413444083] [2021-12-21 09:55:30,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:55:30,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:30,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:30,039 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:30,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 09:55:30,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-21 09:55:30,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 09:55:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:30,139 INFO L387 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 13 treesize of output 9 [2021-12-21 09:55:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:30,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:30,376 INFO L387 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 14 [2021-12-21 09:55:30,385 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:30,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413444083] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:30,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:30,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2021-12-21 09:55:30,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631192099] [2021-12-21 09:55:30,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:30,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 09:55:30,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 09:55:30,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-12-21 09:55:30,429 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:30,683 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-12-21 09:55:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 09:55:30,683 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 09:55:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:30,684 INFO L225 Difference]: With dead ends: 47 [2021-12-21 09:55:30,684 INFO L226 Difference]: Without dead ends: 45 [2021-12-21 09:55:30,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 09:55:30,685 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:30,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 146 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:55:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-21 09:55:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-12-21 09:55:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-12-21 09:55:30,688 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2021-12-21 09:55:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:30,689 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-12-21 09:55:30,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-12-21 09:55:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 09:55:30,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:30,689 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:30,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:30,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:30,890 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:30,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1264665552, now seen corresponding path program 7 times [2021-12-21 09:55:30,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:30,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656647309] [2021-12-21 09:55:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:30,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:30,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:30,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656647309] [2021-12-21 09:55:30,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656647309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:30,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957351783] [2021-12-21 09:55:30,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 09:55:30,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:30,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:30,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:30,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 09:55:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:31,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:55:31,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:31,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:31,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957351783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:31,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:31,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-21 09:55:31,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065251700] [2021-12-21 09:55:31,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:31,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 09:55:31,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:31,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 09:55:31,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-21 09:55:31,217 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:31,320 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-12-21 09:55:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 09:55:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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 38 [2021-12-21 09:55:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:31,321 INFO L225 Difference]: With dead ends: 94 [2021-12-21 09:55:31,321 INFO L226 Difference]: Without dead ends: 52 [2021-12-21 09:55:31,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:55:31,322 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:31,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 106 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:55:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-21 09:55:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2021-12-21 09:55:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-12-21 09:55:31,326 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2021-12-21 09:55:31,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:31,326 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-12-21 09:55:31,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-12-21 09:55:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 09:55:31,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:31,327 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:31,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:31,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 09:55:31,545 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:31,545 INFO L85 PathProgramCache]: Analyzing trace with hash 122087364, now seen corresponding path program 8 times [2021-12-21 09:55:31,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:31,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940570023] [2021-12-21 09:55:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:31,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:31,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940570023] [2021-12-21 09:55:31,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940570023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549125301] [2021-12-21 09:55:31,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:55:31,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:31,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:31,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:31,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 09:55:31,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:55:31,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:31,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 09:55:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:31,806 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:31,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:32,006 INFO L387 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 14 [2021-12-21 09:55:32,008 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:32,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549125301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:32,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:32,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 20 [2021-12-21 09:55:32,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59626969] [2021-12-21 09:55:32,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:32,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 09:55:32,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 09:55:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-12-21 09:55:32,055 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:32,331 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-12-21 09:55:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 09:55:32,331 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-21 09:55:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:32,332 INFO L225 Difference]: With dead ends: 54 [2021-12-21 09:55:32,332 INFO L226 Difference]: Without dead ends: 52 [2021-12-21 09:55:32,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 09:55:32,333 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:32,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 183 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:55:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-21 09:55:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-12-21 09:55:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-12-21 09:55:32,337 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2021-12-21 09:55:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:32,337 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-12-21 09:55:32,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:32,337 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-12-21 09:55:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 09:55:32,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:32,338 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:32,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:32,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:32,551 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:32,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1087582854, now seen corresponding path program 9 times [2021-12-21 09:55:32,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:32,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448580459] [2021-12-21 09:55:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:32,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:32,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:32,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448580459] [2021-12-21 09:55:32,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448580459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:32,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310889810] [2021-12-21 09:55:32,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:55:32,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:32,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:32,659 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:32,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 09:55:32,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 09:55:32,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 09:55:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:32,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:33,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310889810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:33,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:33,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-21 09:55:33,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030509389] [2021-12-21 09:55:33,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:33,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 09:55:33,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 09:55:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-21 09:55:33,042 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:33,179 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2021-12-21 09:55:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 09:55:33,180 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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 45 [2021-12-21 09:55:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:33,180 INFO L225 Difference]: With dead ends: 109 [2021-12-21 09:55:33,180 INFO L226 Difference]: Without dead ends: 59 [2021-12-21 09:55:33,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-21 09:55:33,181 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:33,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 106 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:55:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-21 09:55:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2021-12-21 09:55:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-12-21 09:55:33,185 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2021-12-21 09:55:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:33,185 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-12-21 09:55:33,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-12-21 09:55:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 09:55:33,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:33,186 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:33,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:33,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 09:55:33,403 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2143538330, now seen corresponding path program 10 times [2021-12-21 09:55:33,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:33,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392538430] [2021-12-21 09:55:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:33,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:33,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392538430] [2021-12-21 09:55:33,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392538430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:33,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294069334] [2021-12-21 09:55:33,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:55:33,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:33,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:33,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:33,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 09:55:33,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:55:33,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:33,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 09:55:33,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:33,660 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:33,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:33,905 INFO L387 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 14 [2021-12-21 09:55:33,907 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:33,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294069334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:33,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:33,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 23 [2021-12-21 09:55:33,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577809366] [2021-12-21 09:55:33,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:33,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 09:55:33,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 09:55:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-21 09:55:33,992 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:34,350 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-12-21 09:55:34,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-21 09:55:34,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-21 09:55:34,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:34,350 INFO L225 Difference]: With dead ends: 61 [2021-12-21 09:55:34,350 INFO L226 Difference]: Without dead ends: 59 [2021-12-21 09:55:34,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 09:55:34,351 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:34,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 240 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:55:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-21 09:55:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-12-21 09:55:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-12-21 09:55:34,355 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2021-12-21 09:55:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:34,355 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-12-21 09:55:34,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-12-21 09:55:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 09:55:34,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:34,356 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:34,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:34,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 09:55:34,563 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash -546342884, now seen corresponding path program 11 times [2021-12-21 09:55:34,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:34,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492574364] [2021-12-21 09:55:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:34,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:34,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492574364] [2021-12-21 09:55:34,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492574364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736018509] [2021-12-21 09:55:34,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:55:34,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:34,713 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:34,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 09:55:34,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-21 09:55:34,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:34,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 09:55:34,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:34,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:35,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736018509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:35,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:35,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-21 09:55:35,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983829444] [2021-12-21 09:55:35,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:35,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 09:55:35,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 09:55:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-21 09:55:35,089 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:35,231 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2021-12-21 09:55:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 09:55:35,231 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-21 09:55:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:35,232 INFO L225 Difference]: With dead ends: 124 [2021-12-21 09:55:35,232 INFO L226 Difference]: Without dead ends: 66 [2021-12-21 09:55:35,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 09:55:35,233 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:35,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 124 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:55:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-21 09:55:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-12-21 09:55:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-12-21 09:55:35,237 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2021-12-21 09:55:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:35,237 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-12-21 09:55:35,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-12-21 09:55:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 09:55:35,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:35,238 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:35,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:35,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 09:55:35,455 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash 969527472, now seen corresponding path program 12 times [2021-12-21 09:55:35,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:35,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663688912] [2021-12-21 09:55:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:35,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:35,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:35,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663688912] [2021-12-21 09:55:35,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663688912] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:35,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111082552] [2021-12-21 09:55:35,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:55:35,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:35,640 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:35,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 09:55:35,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-21 09:55:35,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:35,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 09:55:35,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:35,976 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:36,468 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-21 09:55:36,468 INFO L387 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 44 treesize of output 23 [2021-12-21 09:55:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:36,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:37,014 INFO L387 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 18 treesize of output 16 [2021-12-21 09:55:37,016 INFO L387 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 34 treesize of output 28 [2021-12-21 09:55:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:37,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111082552] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:37,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:37,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2021-12-21 09:55:37,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045139021] [2021-12-21 09:55:37,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:37,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-21 09:55:37,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-21 09:55:37,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-12-21 09:55:37,056 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:37,746 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2021-12-21 09:55:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 09:55:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 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 55 [2021-12-21 09:55:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:37,747 INFO L225 Difference]: With dead ends: 92 [2021-12-21 09:55:37,747 INFO L226 Difference]: Without dead ends: 60 [2021-12-21 09:55:37,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=671, Invalid=5029, Unknown=0, NotChecked=0, Total=5700 [2021-12-21 09:55:37,749 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:37,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 304 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 269 Invalid, 0 Unknown, 166 Unchecked, 0.1s Time] [2021-12-21 09:55:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-21 09:55:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-12-21 09:55:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-12-21 09:55:37,753 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2021-12-21 09:55:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:37,753 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-12-21 09:55:37,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-12-21 09:55:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 09:55:37,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:37,754 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:37,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-21 09:55:37,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 09:55:37,972 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:37,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2019414246, now seen corresponding path program 1 times [2021-12-21 09:55:37,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:37,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611091744] [2021-12-21 09:55:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:37,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 09:55:38,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611091744] [2021-12-21 09:55:38,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611091744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:38,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189724286] [2021-12-21 09:55:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:38,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:38,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:38,041 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:38,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 09:55:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:38,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 09:55:38,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 09:55:38,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 09:55:38,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189724286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:38,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:38,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-21 09:55:38,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105563698] [2021-12-21 09:55:38,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:38,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 09:55:38,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:38,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 09:55:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-12-21 09:55:38,369 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:38,512 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2021-12-21 09:55:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 09:55:38,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 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 58 [2021-12-21 09:55:38,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:38,514 INFO L225 Difference]: With dead ends: 187 [2021-12-21 09:55:38,515 INFO L226 Difference]: Without dead ends: 155 [2021-12-21 09:55:38,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-12-21 09:55:38,516 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:38,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 80 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:55:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-21 09:55:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2021-12-21 09:55:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-12-21 09:55:38,529 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 58 [2021-12-21 09:55:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:38,530 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-12-21 09:55:38,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-12-21 09:55:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 09:55:38,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:38,531 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:38,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:38,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:38,747 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:38,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1317814372, now seen corresponding path program 13 times [2021-12-21 09:55:38,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:38,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912318789] [2021-12-21 09:55:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:38,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:38,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:38,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912318789] [2021-12-21 09:55:38,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912318789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:38,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824359543] [2021-12-21 09:55:38,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 09:55:38,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:38,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:38,979 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:38,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 09:55:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:39,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 09:55:39,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:39,108 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:39,163 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-21 09:55:39,163 INFO L387 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-21 09:55:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:39,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:39,567 INFO L387 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 14 [2021-12-21 09:55:39,569 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:39,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824359543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:39,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:39,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 29 [2021-12-21 09:55:39,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958813575] [2021-12-21 09:55:39,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:39,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 09:55:39,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 09:55:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-21 09:55:39,652 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:40,184 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2021-12-21 09:55:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-21 09:55:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-21 09:55:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:40,185 INFO L225 Difference]: With dead ends: 131 [2021-12-21 09:55:40,185 INFO L226 Difference]: Without dead ends: 129 [2021-12-21 09:55:40,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 09:55:40,186 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:40,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 376 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 722 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2021-12-21 09:55:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-21 09:55:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2021-12-21 09:55:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-12-21 09:55:40,193 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 58 [2021-12-21 09:55:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:40,193 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-12-21 09:55:40,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-12-21 09:55:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 09:55:40,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:40,195 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:40,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:40,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 09:55:40,412 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:40,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash 432429360, now seen corresponding path program 14 times [2021-12-21 09:55:40,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:40,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226572055] [2021-12-21 09:55:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:40,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:40,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:40,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226572055] [2021-12-21 09:55:40,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226572055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:40,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980423741] [2021-12-21 09:55:40,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:55:40,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:40,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:40,636 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:40,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 09:55:40,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:55:40,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:40,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-21 09:55:40,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:40,774 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:40,810 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:40,810 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:55:40,842 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:40,843 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:55:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:41,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:41,243 INFO L387 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 14 [2021-12-21 09:55:41,244 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:55:41,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980423741] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:41,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:41,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 30 [2021-12-21 09:55:41,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287434016] [2021-12-21 09:55:41,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:41,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 09:55:41,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 09:55:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-12-21 09:55:41,309 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:41,829 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-12-21 09:55:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-21 09:55:41,830 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 09:55:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:41,830 INFO L225 Difference]: With dead ends: 126 [2021-12-21 09:55:41,830 INFO L226 Difference]: Without dead ends: 124 [2021-12-21 09:55:41,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:55:41,831 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:41,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 420 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 09:55:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-21 09:55:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2021-12-21 09:55:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-12-21 09:55:41,838 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 61 [2021-12-21 09:55:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:41,838 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-12-21 09:55:41,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:41,839 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-12-21 09:55:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 09:55:41,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:41,839 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:41,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:42,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 09:55:42,055 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1425668434, now seen corresponding path program 15 times [2021-12-21 09:55:42,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:42,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804585743] [2021-12-21 09:55:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:42,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:42,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:42,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804585743] [2021-12-21 09:55:42,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804585743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:42,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439521058] [2021-12-21 09:55:42,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:55:42,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:42,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:42,265 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:42,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 09:55:42,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-21 09:55:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:42,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 09:55:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:42,554 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:43,372 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-21 09:55:43,373 INFO L387 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 44 treesize of output 23 [2021-12-21 09:55:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:43,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:44,037 INFO L387 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 18 treesize of output 16 [2021-12-21 09:55:44,042 INFO L387 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 34 treesize of output 28 [2021-12-21 09:55:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:44,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439521058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:44,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:44,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2021-12-21 09:55:44,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725841590] [2021-12-21 09:55:44,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:44,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-21 09:55:44,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:44,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-21 09:55:44,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2322, Unknown=1, NotChecked=0, Total=2652 [2021-12-21 09:55:44,087 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:44,850 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-12-21 09:55:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-21 09:55:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-21 09:55:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:44,851 INFO L225 Difference]: With dead ends: 125 [2021-12-21 09:55:44,851 INFO L226 Difference]: Without dead ends: 89 [2021-12-21 09:55:44,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=781, Invalid=6190, Unknown=1, NotChecked=0, Total=6972 [2021-12-21 09:55:44,853 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:44,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 383 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 300 Invalid, 0 Unknown, 279 Unchecked, 0.1s Time] [2021-12-21 09:55:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-21 09:55:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-12-21 09:55:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 87 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-12-21 09:55:44,859 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 62 [2021-12-21 09:55:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:44,859 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-12-21 09:55:44,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-12-21 09:55:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 09:55:44,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:44,860 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:44,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:45,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:45,061 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1199724314, now seen corresponding path program 16 times [2021-12-21 09:55:45,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:45,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907345429] [2021-12-21 09:55:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:45,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:45,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:45,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907345429] [2021-12-21 09:55:45,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907345429] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:45,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445037103] [2021-12-21 09:55:45,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:55:45,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:45,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:45,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:45,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 09:55:45,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:55:45,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-21 09:55:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:45,428 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:45,476 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-21 09:55:45,476 INFO L387 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-21 09:55:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:45,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:45,868 INFO L387 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 14 [2021-12-21 09:55:45,870 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:45,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445037103] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:45,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 32 [2021-12-21 09:55:45,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809348261] [2021-12-21 09:55:45,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:45,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 09:55:45,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:45,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 09:55:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-12-21 09:55:45,952 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:46,594 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2021-12-21 09:55:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-21 09:55:46,596 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-21 09:55:46,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:46,596 INFO L225 Difference]: With dead ends: 139 [2021-12-21 09:55:46,596 INFO L226 Difference]: Without dead ends: 137 [2021-12-21 09:55:46,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 113 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=3155, Unknown=0, NotChecked=0, Total=3422 [2021-12-21 09:55:46,597 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 112 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:46,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 485 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 936 Invalid, 0 Unknown, 5 Unchecked, 0.3s Time] [2021-12-21 09:55:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-21 09:55:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2021-12-21 09:55:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.108695652173913) internal successors, (102), 92 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-12-21 09:55:46,605 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 65 [2021-12-21 09:55:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:46,605 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-12-21 09:55:46,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-12-21 09:55:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 09:55:46,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:46,606 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:46,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:46,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:46,824 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1374347474, now seen corresponding path program 17 times [2021-12-21 09:55:46,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:46,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747376337] [2021-12-21 09:55:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:46,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:47,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747376337] [2021-12-21 09:55:47,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747376337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792820600] [2021-12-21 09:55:47,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:55:47,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:47,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:47,097 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:47,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 09:55:47,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-21 09:55:47,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:47,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-21 09:55:47,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:47,323 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:47,359 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:47,360 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:55:47,423 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:47,424 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:55:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:47,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:47,871 INFO L387 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 14 [2021-12-21 09:55:47,873 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:55:47,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792820600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:47,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:47,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 33 [2021-12-21 09:55:47,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528636674] [2021-12-21 09:55:47,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:47,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 09:55:47,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:47,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 09:55:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 09:55:47,944 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:48,631 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-12-21 09:55:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 09:55:48,632 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-21 09:55:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:48,632 INFO L225 Difference]: With dead ends: 134 [2021-12-21 09:55:48,632 INFO L226 Difference]: Without dead ends: 132 [2021-12-21 09:55:48,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2021-12-21 09:55:48,633 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:48,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 535 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 09:55:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-21 09:55:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2021-12-21 09:55:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-12-21 09:55:48,643 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 68 [2021-12-21 09:55:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:48,643 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-12-21 09:55:48,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-12-21 09:55:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 09:55:48,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:48,643 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:48,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:48,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:48,844 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:48,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2030424676, now seen corresponding path program 18 times [2021-12-21 09:55:48,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:48,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690172685] [2021-12-21 09:55:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:48,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:49,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:49,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690172685] [2021-12-21 09:55:49,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690172685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:49,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408952675] [2021-12-21 09:55:49,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:55:49,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:49,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:49,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:49,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 09:55:49,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-21 09:55:49,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:49,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 09:55:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:49,787 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:50,460 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-21 09:55:50,460 INFO L387 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 44 treesize of output 23 [2021-12-21 09:55:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 120 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:50,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:51,223 INFO L387 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 18 treesize of output 16 [2021-12-21 09:55:51,225 INFO L387 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 34 treesize of output 28 [2021-12-21 09:55:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:51,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408952675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:51,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:51,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2021-12-21 09:55:51,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149815686] [2021-12-21 09:55:51,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:51,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-21 09:55:51,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:51,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-21 09:55:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2021-12-21 09:55:51,268 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:52,024 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2021-12-21 09:55:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-21 09:55:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-21 09:55:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:52,026 INFO L225 Difference]: With dead ends: 133 [2021-12-21 09:55:52,026 INFO L226 Difference]: Without dead ends: 93 [2021-12-21 09:55:52,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2021-12-21 09:55:52,028 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:52,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 427 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 392 Invalid, 0 Unknown, 177 Unchecked, 0.1s Time] [2021-12-21 09:55:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-21 09:55:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-12-21 09:55:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-12-21 09:55:52,036 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 69 [2021-12-21 09:55:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:52,036 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-12-21 09:55:52,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-12-21 09:55:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 09:55:52,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:52,037 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:52,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:52,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-21 09:55:52,244 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1242460280, now seen corresponding path program 19 times [2021-12-21 09:55:52,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:52,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534963462] [2021-12-21 09:55:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:52,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:52,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:52,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534963462] [2021-12-21 09:55:52,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534963462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:52,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528026669] [2021-12-21 09:55:52,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 09:55:52,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:52,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:52,534 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:52,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 09:55:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 09:55:52,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:52,700 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:52,751 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-21 09:55:52,752 INFO L387 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-21 09:55:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:53,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:53,206 INFO L387 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 14 [2021-12-21 09:55:53,209 INFO L387 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 28 treesize of output 24 [2021-12-21 09:55:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:53,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528026669] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:53,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:53,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 35 [2021-12-21 09:55:53,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878305468] [2021-12-21 09:55:53,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:53,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-21 09:55:53,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:53,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-21 09:55:53,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 09:55:53,293 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:53,991 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-12-21 09:55:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-21 09:55:53,991 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-21 09:55:53,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:53,992 INFO L225 Difference]: With dead ends: 146 [2021-12-21 09:55:53,992 INFO L226 Difference]: Without dead ends: 144 [2021-12-21 09:55:53,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 133 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2021-12-21 09:55:53,994 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:53,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 528 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1083 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2021-12-21 09:55:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-21 09:55:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2021-12-21 09:55:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2021-12-21 09:55:54,003 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 72 [2021-12-21 09:55:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:54,003 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2021-12-21 09:55:54,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2021-12-21 09:55:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 09:55:54,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:54,004 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:54,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-21 09:55:54,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-21 09:55:54,205 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1008588316, now seen corresponding path program 20 times [2021-12-21 09:55:54,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:54,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400856327] [2021-12-21 09:55:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:54,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:54,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:54,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400856327] [2021-12-21 09:55:54,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400856327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:54,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107799658] [2021-12-21 09:55:54,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:55:54,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:54,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:54,481 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:54,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-21 09:55:54,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:55:54,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:54,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-21 09:55:54,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:54,639 INFO L387 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 15 treesize of output 11 [2021-12-21 09:55:54,672 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:54,673 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:55:54,747 INFO L353 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-21 09:55:54,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-12-21 09:55:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:57,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:57,728 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_502| Int)) (or (and (not (<= |v_ULTIMATE.start_main_~i~0#1_502| 7)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_502| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_502|)))) is different from false [2021-12-21 09:55:57,734 INFO L387 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 28 treesize of output 26 [2021-12-21 09:55:57,737 INFO L387 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 54 treesize of output 50 [2021-12-21 09:55:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-21 09:55:57,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107799658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:57,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:57,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 42 [2021-12-21 09:55:57,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250066978] [2021-12-21 09:55:57,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:57,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-21 09:55:57,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-21 09:55:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1482, Unknown=1, NotChecked=78, Total=1722 [2021-12-21 09:55:57,824 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:58,490 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_502| Int)) (or (and (not (<= |v_ULTIMATE.start_main_~i~0#1_502| 7)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_502| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_502|)))) (<= |c_ULTIMATE.start_main_~i~0#1| 8) (<= 8 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2021-12-21 09:55:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:59,379 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2021-12-21 09:55:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-21 09:55:59,379 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 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 75 [2021-12-21 09:55:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:59,380 INFO L225 Difference]: With dead ends: 171 [2021-12-21 09:55:59,380 INFO L226 Difference]: Without dead ends: 169 [2021-12-21 09:55:59,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=224, Invalid=2434, Unknown=2, NotChecked=202, Total=2862 [2021-12-21 09:55:59,381 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:59,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 532 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 838 Invalid, 0 Unknown, 235 Unchecked, 0.3s Time] [2021-12-21 09:55:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-21 09:55:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 100. [2021-12-21 09:55:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-12-21 09:55:59,392 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 75 [2021-12-21 09:55:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:59,392 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-12-21 09:55:59,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-12-21 09:55:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 09:55:59,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:59,393 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:59,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-21 09:55:59,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:59,603 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1156969278, now seen corresponding path program 21 times [2021-12-21 09:55:59,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:59,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19229459] [2021-12-21 09:55:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:59,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:59,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:59,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19229459] [2021-12-21 09:55:59,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19229459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:59,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249834465] [2021-12-21 09:55:59,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:55:59,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:59,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:59,907 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:59,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-21 09:56:00,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-21 09:56:00,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:00,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 09:56:00,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:00,414 INFO L387 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 15 treesize of output 11 [2021-12-21 09:56:01,096 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-21 09:56:01,097 INFO L387 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 44 treesize of output 23 [2021-12-21 09:56:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:01,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:01,927 INFO L387 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 18 treesize of output 16 [2021-12-21 09:56:01,931 INFO L387 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 34 treesize of output 28 [2021-12-21 09:56:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249834465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:01,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:01,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2021-12-21 09:56:01,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630603708] [2021-12-21 09:56:01,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:01,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-21 09:56:01,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-21 09:56:01,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2021-12-21 09:56:01,977 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:03,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:03,114 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2021-12-21 09:56:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-21 09:56:03,114 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-21 09:56:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:03,115 INFO L225 Difference]: With dead ends: 146 [2021-12-21 09:56:03,115 INFO L226 Difference]: Without dead ends: 102 [2021-12-21 09:56:03,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1103, Invalid=9403, Unknown=0, NotChecked=0, Total=10506 [2021-12-21 09:56:03,116 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:03,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 476 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 461 Invalid, 0 Unknown, 134 Unchecked, 0.2s Time] [2021-12-21 09:56:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-21 09:56:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-12-21 09:56:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.101010101010101) internal successors, (109), 99 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2021-12-21 09:56:03,126 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 76 [2021-12-21 09:56:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:03,127 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2021-12-21 09:56:03,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2021-12-21 09:56:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 09:56:03,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:03,127 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:03,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:03,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:03,328 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:03,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1212887086, now seen corresponding path program 22 times [2021-12-21 09:56:03,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:03,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110984123] [2021-12-21 09:56:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:03,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:03,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110984123] [2021-12-21 09:56:03,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110984123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994724582] [2021-12-21 09:56:03,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:56:03,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:03,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:03,632 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:03,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-21 09:56:03,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:56:03,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-21 09:56:03,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:03,809 INFO L387 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 15 treesize of output 11 [2021-12-21 09:56:03,863 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-21 09:56:03,863 INFO L387 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-21 09:56:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:04,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:04,364 INFO L387 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 14 [2021-12-21 09:56:04,367 INFO L387 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 28 treesize of output 24 [2021-12-21 09:56:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:04,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994724582] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:04,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:04,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 38 [2021-12-21 09:56:04,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883994665] [2021-12-21 09:56:04,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:04,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-21 09:56:04,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-21 09:56:04,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 09:56:04,452 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:05,364 INFO L93 Difference]: Finished difference Result 195 states and 204 transitions. [2021-12-21 09:56:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-21 09:56:05,365 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-21 09:56:05,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:05,365 INFO L225 Difference]: With dead ends: 195 [2021-12-21 09:56:05,365 INFO L226 Difference]: Without dead ends: 193 [2021-12-21 09:56:05,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2021-12-21 09:56:05,366 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 96 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:05,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 810 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1507 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2021-12-21 09:56:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-21 09:56:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 105. [2021-12-21 09:56:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 104 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2021-12-21 09:56:05,395 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 79 [2021-12-21 09:56:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:05,395 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2021-12-21 09:56:05,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2021-12-21 09:56:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 09:56:05,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:05,396 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:05,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:05,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-21 09:56:05,613 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:05,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:05,614 INFO L85 PathProgramCache]: Analyzing trace with hash -931415362, now seen corresponding path program 23 times [2021-12-21 09:56:05,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:05,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272429483] [2021-12-21 09:56:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:05,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:05,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:05,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272429483] [2021-12-21 09:56:05,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272429483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:05,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257878391] [2021-12-21 09:56:05,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:56:05,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:05,932 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:05,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-21 09:56:06,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-21 09:56:06,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-21 09:56:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:06,150 INFO L387 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 15 treesize of output 11 [2021-12-21 09:56:06,185 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:56:06,185 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:56:06,218 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:56:06,219 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:56:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:06,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:06,754 INFO L387 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 14 [2021-12-21 09:56:06,756 INFO L387 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 28 treesize of output 24 [2021-12-21 09:56:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:56:06,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257878391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:06,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:06,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 39 [2021-12-21 09:56:06,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989592005] [2021-12-21 09:56:06,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:06,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-21 09:56:06,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-21 09:56:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 09:56:06,843 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:07,719 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2021-12-21 09:56:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-21 09:56:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-21 09:56:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:07,720 INFO L225 Difference]: With dead ends: 190 [2021-12-21 09:56:07,720 INFO L226 Difference]: Without dead ends: 188 [2021-12-21 09:56:07,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=3740, Unknown=0, NotChecked=0, Total=4032 [2021-12-21 09:56:07,721 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 103 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:07,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 738 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 09:56:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-21 09:56:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 138. [2021-12-21 09:56:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2021-12-21 09:56:07,742 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 82 [2021-12-21 09:56:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:07,742 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2021-12-21 09:56:07,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2021-12-21 09:56:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 09:56:07,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:07,743 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:07,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:07,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-21 09:56:07,943 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:07,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash 925630088, now seen corresponding path program 24 times [2021-12-21 09:56:07,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:07,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499258688] [2021-12-21 09:56:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:07,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:08,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499258688] [2021-12-21 09:56:08,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499258688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375815322] [2021-12-21 09:56:08,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:56:08,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:08,275 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:08,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-21 09:56:08,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-21 09:56:08,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:08,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 09:56:08,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:08,943 INFO L387 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 15 treesize of output 11 [2021-12-21 09:56:09,750 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-21 09:56:09,750 INFO L387 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 44 treesize of output 23 [2021-12-21 09:56:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 190 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:09,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:10,679 INFO L387 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 18 treesize of output 16 [2021-12-21 09:56:10,681 INFO L387 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 34 treesize of output 28 [2021-12-21 09:56:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:10,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375815322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:10,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:10,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 67 [2021-12-21 09:56:10,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492923230] [2021-12-21 09:56:10,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:10,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-21 09:56:10,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:10,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-21 09:56:10,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2021-12-21 09:56:10,732 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:12,076 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2021-12-21 09:56:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-21 09:56:12,076 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-21 09:56:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:12,077 INFO L225 Difference]: With dead ends: 187 [2021-12-21 09:56:12,077 INFO L226 Difference]: Without dead ends: 139 [2021-12-21 09:56:12,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1269, Invalid=11163, Unknown=0, NotChecked=0, Total=12432 [2021-12-21 09:56:12,078 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 79 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:12,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 496 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 496 Invalid, 0 Unknown, 330 Unchecked, 0.2s Time] [2021-12-21 09:56:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-21 09:56:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-12-21 09:56:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.072992700729927) internal successors, (147), 137 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2021-12-21 09:56:12,099 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 83 [2021-12-21 09:56:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:12,099 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2021-12-21 09:56:12,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2021-12-21 09:56:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-21 09:56:12,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:12,099 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:12,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-21 09:56:12,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-21 09:56:12,300 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1667994484, now seen corresponding path program 25 times [2021-12-21 09:56:12,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:12,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115678569] [2021-12-21 09:56:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:12,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:12,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115678569] [2021-12-21 09:56:12,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115678569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991609028] [2021-12-21 09:56:12,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 09:56:12,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:12,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:12,641 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:12,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-21 09:56:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:12,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-21 09:56:12,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:12,835 INFO L387 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 15 treesize of output 11 [2021-12-21 09:56:12,890 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-21 09:56:12,891 INFO L387 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-21 09:56:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:13,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:13,444 INFO L387 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 14 [2021-12-21 09:56:13,445 INFO L387 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 28 treesize of output 24 [2021-12-21 09:56:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:13,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991609028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:13,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:13,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 41 [2021-12-21 09:56:13,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960426899] [2021-12-21 09:56:13,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:13,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-21 09:56:13,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-21 09:56:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 09:56:13,541 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:14,607 INFO L93 Difference]: Finished difference Result 203 states and 211 transitions. [2021-12-21 09:56:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-21 09:56:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-21 09:56:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:14,608 INFO L225 Difference]: With dead ends: 203 [2021-12-21 09:56:14,608 INFO L226 Difference]: Without dead ends: 201 [2021-12-21 09:56:14,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 152 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=348, Invalid=5504, Unknown=0, NotChecked=0, Total=5852 [2021-12-21 09:56:14,609 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 114 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:14,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 905 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1708 Invalid, 0 Unknown, 5 Unchecked, 0.6s Time] [2021-12-21 09:56:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-21 09:56:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 143. [2021-12-21 09:56:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0704225352112675) internal successors, (152), 142 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2021-12-21 09:56:14,632 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 86 [2021-12-21 09:56:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:14,632 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2021-12-21 09:56:14,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2021-12-21 09:56:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-21 09:56:14,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:14,633 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:14,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:14,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 09:56:14,835 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1635858680, now seen corresponding path program 26 times [2021-12-21 09:56:14,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:14,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101745283] [2021-12-21 09:56:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:14,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:15,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101745283] [2021-12-21 09:56:15,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101745283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561942629] [2021-12-21 09:56:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:56:15,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:15,188 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:15,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-21 09:56:15,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:56:15,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-21 09:56:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:15,359 INFO L387 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 15 treesize of output 11 [2021-12-21 09:56:15,395 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:56:15,395 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:56:15,432 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:56:15,433 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:56:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 2 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:15,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:16,025 INFO L387 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 14 [2021-12-21 09:56:16,027 INFO L387 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 28 treesize of output 24 [2021-12-21 09:56:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:56:16,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561942629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:16,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:16,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 42 [2021-12-21 09:56:16,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322568389] [2021-12-21 09:56:16,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:16,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-21 09:56:16,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:16,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-21 09:56:16,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 09:56:16,122 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:17,059 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2021-12-21 09:56:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-21 09:56:17,060 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 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 89 [2021-12-21 09:56:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:17,061 INFO L225 Difference]: With dead ends: 198 [2021-12-21 09:56:17,061 INFO L226 Difference]: Without dead ends: 196 [2021-12-21 09:56:17,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 157 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2021-12-21 09:56:17,061 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:17,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 842 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 09:56:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-21 09:56:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2021-12-21 09:56:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.070921985815603) internal successors, (151), 141 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2021-12-21 09:56:17,085 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 89 [2021-12-21 09:56:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:17,086 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2021-12-21 09:56:17,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2021-12-21 09:56:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 09:56:17,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:17,086 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:17,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-21 09:56:17,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:17,288 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash -592174806, now seen corresponding path program 27 times [2021-12-21 09:56:17,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:17,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260674830] [2021-12-21 09:56:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:17,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:17,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:17,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260674830] [2021-12-21 09:56:17,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260674830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:17,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549202800] [2021-12-21 09:56:17,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:56:17,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:17,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:17,643 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:17,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-21 09:56:17,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-21 09:56:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:17,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-21 09:56:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:18,195 INFO L387 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 15 treesize of output 11 [2021-12-21 09:56:19,086 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-21 09:56:19,087 INFO L387 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 44 treesize of output 23 [2021-12-21 09:56:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:19,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:20,120 INFO L387 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 18 treesize of output 16 [2021-12-21 09:56:20,122 INFO L387 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 34 treesize of output 28 [2021-12-21 09:56:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:20,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549202800] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:20,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:20,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 72 [2021-12-21 09:56:20,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216201184] [2021-12-21 09:56:20,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:20,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-21 09:56:20,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-21 09:56:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4521, Unknown=0, NotChecked=0, Total=5112 [2021-12-21 09:56:20,172 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:21,679 INFO L93 Difference]: Finished difference Result 194 states and 203 transitions. [2021-12-21 09:56:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-21 09:56:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-21 09:56:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:21,681 INFO L225 Difference]: With dead ends: 194 [2021-12-21 09:56:21,681 INFO L226 Difference]: Without dead ends: 142 [2021-12-21 09:56:21,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2706 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1415, Invalid=12865, Unknown=0, NotChecked=0, Total=14280 [2021-12-21 09:56:21,682 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 94 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:21,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 553 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 616 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2021-12-21 09:56:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-21 09:56:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-12-21 09:56:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0638297872340425) internal successors, (150), 141 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2021-12-21 09:56:21,706 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 90 [2021-12-21 09:56:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:21,706 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2021-12-21 09:56:21,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2021-12-21 09:56:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 09:56:21,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:21,707 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:21,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-21 09:56:21,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:21,919 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash 756771518, now seen corresponding path program 28 times [2021-12-21 09:56:21,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279037494] [2021-12-21 09:56:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:21,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:22,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:22,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279037494] [2021-12-21 09:56:22,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279037494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:22,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63659801] [2021-12-21 09:56:22,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:56:22,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:22,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:22,312 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:22,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-21 09:56:22,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:56:22,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-21 09:56:22,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:22,522 INFO L387 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 15 treesize of output 11 [2021-12-21 09:56:22,575 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-21 09:56:22,575 INFO L387 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-21 09:56:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:23,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:23,201 INFO L387 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 14 [2021-12-21 09:56:23,203 INFO L387 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 28 treesize of output 24 [2021-12-21 09:56:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:23,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63659801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:23,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:23,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 44 [2021-12-21 09:56:23,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211574484] [2021-12-21 09:56:23,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:23,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-21 09:56:23,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-21 09:56:23,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 09:56:23,309 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:24,475 INFO L93 Difference]: Finished difference Result 211 states and 218 transitions. [2021-12-21 09:56:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-21 09:56:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-21 09:56:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:24,477 INFO L225 Difference]: With dead ends: 211 [2021-12-21 09:56:24,477 INFO L226 Difference]: Without dead ends: 209 [2021-12-21 09:56:24,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=6431, Unknown=0, NotChecked=0, Total=6806 [2021-12-21 09:56:24,478 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 150 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:24,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1022 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1917 Invalid, 0 Unknown, 9 Unchecked, 0.6s Time] [2021-12-21 09:56:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-21 09:56:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2021-12-21 09:56:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0616438356164384) internal successors, (155), 146 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2021-12-21 09:56:24,505 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 93 [2021-12-21 09:56:24,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:24,505 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2021-12-21 09:56:24,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:24,506 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2021-12-21 09:56:24,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 09:56:24,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:24,506 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:24,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:24,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-21 09:56:24,723 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:24,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:24,723 INFO L85 PathProgramCache]: Analyzing trace with hash 287613210, now seen corresponding path program 2 times [2021-12-21 09:56:24,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:24,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467793268] [2021-12-21 09:56:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:24,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-21 09:56:24,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:24,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467793268] [2021-12-21 09:56:24,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467793268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:24,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79550420] [2021-12-21 09:56:24,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:56:24,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:24,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:24,858 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:24,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-21 09:56:24,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:56:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:24,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 09:56:24,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-21 09:56:25,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-21 09:56:25,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79550420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:25,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:25,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2021-12-21 09:56:25,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374590935] [2021-12-21 09:56:25,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:25,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 09:56:25,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 09:56:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 09:56:25,540 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:25,868 INFO L93 Difference]: Finished difference Result 458 states and 504 transitions. [2021-12-21 09:56:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-21 09:56:25,869 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-21 09:56:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:25,870 INFO L225 Difference]: With dead ends: 458 [2021-12-21 09:56:25,870 INFO L226 Difference]: Without dead ends: 406 [2021-12-21 09:56:25,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 09:56:25,871 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 541 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:25,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 152 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:56:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-12-21 09:56:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 201. [2021-12-21 09:56:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.135) internal successors, (227), 200 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2021-12-21 09:56:25,914 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 93 [2021-12-21 09:56:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:25,914 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2021-12-21 09:56:25,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2021-12-21 09:56:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 09:56:25,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:25,915 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:25,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:26,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:26,124 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash -792278870, now seen corresponding path program 29 times [2021-12-21 09:56:26,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:26,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118635965] [2021-12-21 09:56:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:26,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:26,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:26,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118635965] [2021-12-21 09:56:26,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118635965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:26,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246784749] [2021-12-21 09:56:26,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:56:26,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:26,510 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:26,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-21 09:56:26,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-21 09:56:26,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-21 09:56:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:26,848 INFO L387 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 15 treesize of output 11 [2021-12-21 09:56:26,884 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:56:26,884 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:56:26,920 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:56:26,921 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 09:56:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 2 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:27,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:27,557 INFO L387 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 14 [2021-12-21 09:56:27,558 INFO L387 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 28 treesize of output 24 [2021-12-21 09:56:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:56:27,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246784749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:27,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:27,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 45 [2021-12-21 09:56:27,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149500527] [2021-12-21 09:56:27,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:27,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-21 09:56:27,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:27,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-21 09:56:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2021-12-21 09:56:27,677 INFO L87 Difference]: Start difference. First operand 201 states and 227 transitions. Second operand has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:28,787 INFO L93 Difference]: Finished difference Result 260 states and 285 transitions. [2021-12-21 09:56:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-21 09:56:28,788 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-21 09:56:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:28,789 INFO L225 Difference]: With dead ends: 260 [2021-12-21 09:56:28,789 INFO L226 Difference]: Without dead ends: 258 [2021-12-21 09:56:28,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 170 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=336, Invalid=5066, Unknown=0, NotChecked=0, Total=5402 [2021-12-21 09:56:28,789 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 120 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:28,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1030 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 09:56:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-21 09:56:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 200. [2021-12-21 09:56:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.135678391959799) internal successors, (226), 199 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 226 transitions. [2021-12-21 09:56:28,821 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 226 transitions. Word has length 96 [2021-12-21 09:56:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:28,821 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 226 transitions. [2021-12-21 09:56:28,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:28,822 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 226 transitions. [2021-12-21 09:56:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 09:56:28,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:28,822 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:28,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:29,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:29,036 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:29,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:29,036 INFO L85 PathProgramCache]: Analyzing trace with hash 280183668, now seen corresponding path program 30 times [2021-12-21 09:56:29,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:29,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634311870] [2021-12-21 09:56:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:29,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat