./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewnifrev.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/rewnifrev.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 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:39:03,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:39:03,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:39:03,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:39:03,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:39:03,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:39:03,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:39:03,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:39:03,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:39:03,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:39:03,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:39:03,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:39:03,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:39:03,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:39:03,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:39:03,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:39:03,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:39:03,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:39:03,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:39:03,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:39:03,429 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:39:03,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:39:03,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:39:03,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:39:03,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:39:03,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:39:03,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:39:03,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:39:03,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:39:03,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:39:03,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:39:03,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:39:03,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:39:03,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:39:03,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:39:03,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:39:03,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:39:03,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:39:03,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:39:03,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:39:03,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:39:03,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:39:03,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:39:03,467 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:39:03,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:39:03,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:39:03,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:39:03,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:39:03,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:39:03,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:39:03,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:39:03,469 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:39:03,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:39:03,469 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:39:03,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:39:03,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:39:03,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:39:03,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:39:03,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:39:03,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:39:03,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:39:03,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:39:03,471 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:39:03,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:39:03,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:39:03,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:39:03,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:39:03,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:39:03,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:39:03,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:39:03,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:39:03,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:39:03,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:39:03,472 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:39:03,472 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:39:03,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:39:03,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed [2022-07-19 09:39:03,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:39:03,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:39:03,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:39:03,672 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:39:03,673 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:39:03,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnifrev.c [2022-07-19 09:39:03,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2acf7bf51/27ae9420e1f74f8bbe1b3cffc2ba7950/FLAG87a7eab4a [2022-07-19 09:39:04,058 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:39:04,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev.c [2022-07-19 09:39:04,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2acf7bf51/27ae9420e1f74f8bbe1b3cffc2ba7950/FLAG87a7eab4a [2022-07-19 09:39:04,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2acf7bf51/27ae9420e1f74f8bbe1b3cffc2ba7950 [2022-07-19 09:39:04,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:39:04,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:39:04,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:39:04,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:39:04,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:39:04,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e55926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04, skipping insertion in model container [2022-07-19 09:39:04,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:39:04,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:39:04,202 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/rewnifrev.c[400,413] [2022-07-19 09:39:04,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:39:04,223 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:39:04,233 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/rewnifrev.c[400,413] [2022-07-19 09:39:04,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:39:04,246 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:39:04,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04 WrapperNode [2022-07-19 09:39:04,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:39:04,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:39:04,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:39:04,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:39:04,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,265 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-07-19 09:39:04,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:39:04,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:39:04,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:39:04,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:39:04,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:39:04,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:39:04,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:39:04,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:39:04,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (1/1) ... [2022-07-19 09:39:04,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:39:04,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:04,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 09:39:04,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 09:39:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:39:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:39:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:39:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 09:39:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:39:04,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:39:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:39:04,406 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:39:04,407 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:39:04,527 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:39:04,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:39:04,532 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 09:39:04,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:39:04 BoogieIcfgContainer [2022-07-19 09:39:04,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:39:04,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:39:04,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:39:04,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:39:04,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:39:04" (1/3) ... [2022-07-19 09:39:04,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cf5dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:39:04, skipping insertion in model container [2022-07-19 09:39:04,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:39:04" (2/3) ... [2022-07-19 09:39:04,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cf5dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:39:04, skipping insertion in model container [2022-07-19 09:39:04,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:39:04" (3/3) ... [2022-07-19 09:39:04,541 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnifrev.c [2022-07-19 09:39:04,550 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:39:04,551 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:39:04,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:39:04,605 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d805615, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@325ee1b4 [2022-07-19 09:39:04,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:39:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 09:39:04,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:04,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:04,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-07-19 09:39:04,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:04,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430696201] [2022-07-19 09:39:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:04,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:04,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:04,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430696201] [2022-07-19 09:39:04,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430696201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:39:04,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:39:04,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:39:04,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992217099] [2022-07-19 09:39:04,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:39:04,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:39:04,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:04,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:39:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:39:04,779 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:04,790 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-07-19 09:39:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:39:04,791 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-19 09:39:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:04,797 INFO L225 Difference]: With dead ends: 29 [2022-07-19 09:39:04,797 INFO L226 Difference]: Without dead ends: 14 [2022-07-19 09:39:04,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:39:04,804 INFO L413 NwaCegarLoop]: 21 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, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:04,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:39:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-19 09:39:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-19 09:39:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-19 09:39:04,825 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-19 09:39:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:04,825 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-19 09:39:04,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-19 09:39:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 09:39:04,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:04,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:04,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:39:04,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:04,828 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-07-19 09:39:04,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:04,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042055677] [2022-07-19 09:39:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:04,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:04,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042055677] [2022-07-19 09:39:04,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042055677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:39:04,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:39:04,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:39:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784961468] [2022-07-19 09:39:04,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:39:04,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:39:04,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:39:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:39:04,920 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:04,954 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-19 09:39:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:39:04,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-19 09:39:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:04,955 INFO L225 Difference]: With dead ends: 29 [2022-07-19 09:39:04,955 INFO L226 Difference]: Without dead ends: 18 [2022-07-19 09:39:04,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:39:04,957 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:04,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:39:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-19 09:39:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-07-19 09:39:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-19 09:39:04,973 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-07-19 09:39:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:04,973 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-19 09:39:04,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-19 09:39:04,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 09:39:04,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:04,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:04,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:39:04,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:04,975 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-07-19 09:39:04,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:04,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655848134] [2022-07-19 09:39:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:05,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655848134] [2022-07-19 09:39:05,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655848134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:39:05,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:39:05,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 09:39:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289687304] [2022-07-19 09:39:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:39:05,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:39:05,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:05,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:39:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:39:05,031 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:05,077 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-07-19 09:39:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 09:39:05,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 09:39:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:05,078 INFO L225 Difference]: With dead ends: 32 [2022-07-19 09:39:05,078 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 09:39:05,079 INFO L412 NwaCegarLoop]: 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 [2022-07-19 09:39:05,079 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:05,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:39:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 09:39:05,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-07-19 09:39:05,095 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) [2022-07-19 09:39:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-19 09:39:05,098 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-07-19 09:39:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:05,098 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-19 09:39:05,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-19 09:39:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 09:39:05,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:05,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:05,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 09:39:05,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-07-19 09:39:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:05,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955973340] [2022-07-19 09:39:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:05,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:39:05,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955973340] [2022-07-19 09:39:05,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955973340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:39:05,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:39:05,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 09:39:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151660650] [2022-07-19 09:39:05,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:39:05,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 09:39:05,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 09:39:05,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-19 09:39:05,333 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:05,422 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-07-19 09:39:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 09:39:05,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 09:39:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:05,423 INFO L225 Difference]: With dead ends: 27 [2022-07-19 09:39:05,423 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 09:39:05,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-07-19 09:39:05,424 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:05,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:05,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 09:39:05,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-07-19 09:39:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-19 09:39:05,428 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-07-19 09:39:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:05,428 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-19 09:39:05,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-19 09:39:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 09:39:05,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:05,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:05,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 09:39:05,430 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:05,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:05,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-07-19 09:39:05,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:05,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980060795] [2022-07-19 09:39:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:05,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:05,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:05,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980060795] [2022-07-19 09:39:05,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980060795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:05,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533688532] [2022-07-19 09:39:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:05,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:05,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:05,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:05,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:39:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 09:39:05,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:05,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:05,757 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 09:39:05,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 09:39:05,852 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-19 09:39:05,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-19 09:39:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:05,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:10,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-19 09:39:10,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-19 09:39:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:10,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533688532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:10,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:10,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2022-07-19 09:39:10,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686324264] [2022-07-19 09:39:10,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:10,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 09:39:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 09:39:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=323, Unknown=2, NotChecked=0, Total=420 [2022-07-19 09:39:10,149 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2022-07-19 09:39:12,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:12,341 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-07-19 09:39:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 09:39:12,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) Word has length 20 [2022-07-19 09:39:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:12,342 INFO L225 Difference]: With dead ends: 32 [2022-07-19 09:39:12,342 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 09:39:12,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=196, Invalid=613, Unknown=3, NotChecked=0, Total=812 [2022-07-19 09:39:12,344 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:12,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 55 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 67 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-07-19 09:39:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 09:39:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-07-19 09:39:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-07-19 09:39:12,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-07-19 09:39:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:12,348 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-07-19 09:39:12,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2022-07-19 09:39:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-07-19 09:39:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 09:39:12,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:12,348 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:12,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:12,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:12,549 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:12,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2022-07-19 09:39:12,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:12,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018258864] [2022-07-19 09:39:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:12,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:12,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:12,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018258864] [2022-07-19 09:39:12,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018258864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:12,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843572661] [2022-07-19 09:39:12,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:39:12,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:12,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:12,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:12,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:39:12,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:39:12,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:12,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 09:39:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:12,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:12,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843572661] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:12,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:12,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2022-07-19 09:39:12,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682717583] [2022-07-19 09:39:12,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:12,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 09:39:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 09:39:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2022-07-19 09:39:12,768 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:12,834 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-07-19 09:39:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 09:39:12,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 09:39:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:12,835 INFO L225 Difference]: With dead ends: 56 [2022-07-19 09:39:12,835 INFO L226 Difference]: Without dead ends: 31 [2022-07-19 09:39:12,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:39:12,836 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:12,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 38 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-19 09:39:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-07-19 09:39:12,839 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) [2022-07-19 09:39:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-19 09:39:12,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-07-19 09:39:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:12,840 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-19 09:39:12,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-19 09:39:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 09:39:12,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:12,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:12,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:13,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 09:39:13,061 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:13,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 3 times [2022-07-19 09:39:13,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:13,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419255091] [2022-07-19 09:39:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:13,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:13,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:13,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419255091] [2022-07-19 09:39:13,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419255091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:13,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398692093] [2022-07-19 09:39:13,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:39:13,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:13,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:13,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:13,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:39:13,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 09:39:13,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 09:39:13,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:13,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:13,466 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:13,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:13,477 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:13,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:39:13,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:13,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:39:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:13,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:13,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-19 09:39:13,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2022-07-19 09:39:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:13,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398692093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:13,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:13,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-07-19 09:39:13,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498297386] [2022-07-19 09:39:13,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:13,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 09:39:13,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:13,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 09:39:13,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2022-07-19 09:39:13,941 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:14,436 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-07-19 09:39:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:39:14,437 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 09:39:14,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:14,437 INFO L225 Difference]: With dead ends: 42 [2022-07-19 09:39:14,437 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 09:39:14,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=2004, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 09:39:14,439 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:14,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 172 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-07-19 09:39:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 09:39:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-07-19 09:39:14,443 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) [2022-07-19 09:39:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-19 09:39:14,443 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2022-07-19 09:39:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:14,443 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-19 09:39:14,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-19 09:39:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 09:39:14,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:14,444 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:14,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 09:39:14,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:14,659 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 4 times [2022-07-19 09:39:14,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:14,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218031365] [2022-07-19 09:39:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:14,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:14,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:14,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218031365] [2022-07-19 09:39:14,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218031365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:14,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721379818] [2022-07-19 09:39:14,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:39:14,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:14,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:14,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:14,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:39:14,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:39:14,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:14,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 09:39:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:14,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:14,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721379818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:14,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:14,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 15 [2022-07-19 09:39:14,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415565487] [2022-07-19 09:39:14,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:14,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 09:39:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 09:39:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-07-19 09:39:14,902 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:14,981 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-07-19 09:39:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 09:39:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-19 09:39:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:14,983 INFO L225 Difference]: With dead ends: 68 [2022-07-19 09:39:14,983 INFO L226 Difference]: Without dead ends: 39 [2022-07-19 09:39:14,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2022-07-19 09:39:14,984 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:14,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-19 09:39:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-07-19 09:39:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-07-19 09:39:14,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2022-07-19 09:39:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:14,988 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-07-19 09:39:14,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-07-19 09:39:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 09:39:14,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:14,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:15,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:15,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:15,207 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 5 times [2022-07-19 09:39:15,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:15,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091694126] [2022-07-19 09:39:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:15,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:15,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091694126] [2022-07-19 09:39:15,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091694126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:15,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215347830] [2022-07-19 09:39:15,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:39:15,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:15,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:15,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:15,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:39:15,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 09:39:15,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:15,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 09:39:15,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:15,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:15,662 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:15,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:15,672 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:15,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:15,700 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:15,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:15,710 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:15,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:15,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:39:15,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:39:15,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:39:15,880 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:39:15,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-19 09:39:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:15,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:16,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-19 09:39:16,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2022-07-19 09:39:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:16,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215347830] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:16,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:16,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-07-19 09:39:16,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248940460] [2022-07-19 09:39:16,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:16,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 09:39:16,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:16,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 09:39:16,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-07-19 09:39:16,244 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:16,642 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-07-19 09:39:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 09:39:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-19 09:39:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:16,644 INFO L225 Difference]: With dead ends: 49 [2022-07-19 09:39:16,644 INFO L226 Difference]: Without dead ends: 47 [2022-07-19 09:39:16,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=516, Invalid=1740, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 09:39:16,645 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:16,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 102 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-07-19 09:39:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-19 09:39:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-07-19 09:39:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 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) [2022-07-19 09:39:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-07-19 09:39:16,649 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2022-07-19 09:39:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:16,649 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-07-19 09:39:16,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-07-19 09:39:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 09:39:16,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:16,650 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:16,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:16,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:16,868 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:16,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 6 times [2022-07-19 09:39:16,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:16,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396068359] [2022-07-19 09:39:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:16,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396068359] [2022-07-19 09:39:16,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396068359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008340020] [2022-07-19 09:39:16,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:39:16,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:16,920 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:16,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:39:16,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 09:39:16,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 09:39:16,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:17,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:17,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008340020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:17,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:17,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 18 [2022-07-19 09:39:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496487987] [2022-07-19 09:39:17,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:17,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:39:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:39:17,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2022-07-19 09:39:17,156 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:17,254 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-07-19 09:39:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 09:39:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 09:39:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:17,255 INFO L225 Difference]: With dead ends: 80 [2022-07-19 09:39:17,255 INFO L226 Difference]: Without dead ends: 47 [2022-07-19 09:39:17,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:39:17,256 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:17,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 64 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-19 09:39:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-07-19 09:39:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-19 09:39:17,261 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2022-07-19 09:39:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:17,261 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-19 09:39:17,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-19 09:39:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 09:39:17,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:17,262 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:17,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:17,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:17,478 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:17,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:17,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 7 times [2022-07-19 09:39:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:17,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157887298] [2022-07-19 09:39:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:17,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:17,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157887298] [2022-07-19 09:39:17,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157887298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698105439] [2022-07-19 09:39:17,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:39:17,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:17,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:17,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:17,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:39:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:17,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 09:39:17,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:17,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:17,919 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:17,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:17,929 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:17,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:17,946 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:17,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:17,956 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:17,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:17,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:39:17,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:39:17,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:18,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:39:18,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 09:39:19,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:39:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:19,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:29,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-07-19 09:39:29,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1658 treesize of output 1626 [2022-07-19 09:39:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:30,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698105439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:30,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:30,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 38 [2022-07-19 09:39:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411907716] [2022-07-19 09:39:30,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:30,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 09:39:30,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 09:39:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1130, Unknown=5, NotChecked=0, Total=1406 [2022-07-19 09:39:30,494 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:38,935 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2022-07-19 09:39:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 09:39:38,935 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-19 09:39:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:38,937 INFO L225 Difference]: With dead ends: 84 [2022-07-19 09:39:38,937 INFO L226 Difference]: Without dead ends: 82 [2022-07-19 09:39:38,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=1318, Invalid=4834, Unknown=10, NotChecked=0, Total=6162 [2022-07-19 09:39:38,938 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:38,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 149 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 440 Invalid, 0 Unknown, 172 Unchecked, 0.3s Time] [2022-07-19 09:39:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-19 09:39:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2022-07-19 09:39:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-07-19 09:39:38,956 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2022-07-19 09:39:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:38,957 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-07-19 09:39:38,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-07-19 09:39:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 09:39:38,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:38,958 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:38,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:39,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:39,176 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 8 times [2022-07-19 09:39:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:39,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575808584] [2022-07-19 09:39:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:39,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:39,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:39,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575808584] [2022-07-19 09:39:39,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575808584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:39,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545025287] [2022-07-19 09:39:39,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:39:39,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:39,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:39,241 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:39,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:39:39,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:39:39,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:39,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 09:39:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:39,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:39,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545025287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:39,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:39,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 21 [2022-07-19 09:39:39,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435887421] [2022-07-19 09:39:39,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:39,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 09:39:39,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 09:39:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2022-07-19 09:39:39,511 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:39,616 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2022-07-19 09:39:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 09:39:39,643 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-19 09:39:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:39,645 INFO L225 Difference]: With dead ends: 92 [2022-07-19 09:39:39,645 INFO L226 Difference]: Without dead ends: 55 [2022-07-19 09:39:39,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-07-19 09:39:39,646 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:39,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 74 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-19 09:39:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-07-19 09:39:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-07-19 09:39:39,660 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2022-07-19 09:39:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:39,660 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-07-19 09:39:39,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-07-19 09:39:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 09:39:39,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:39,662 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:39,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:39,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 09:39:39,880 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:39,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 9 times [2022-07-19 09:39:39,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:39,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583810265] [2022-07-19 09:39:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:39,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 26 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583810265] [2022-07-19 09:39:40,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583810265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495408254] [2022-07-19 09:39:40,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:39:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:40,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:40,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 09:39:40,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 09:39:40,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:40,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-19 09:39:40,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:40,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:40,480 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:40,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:40,490 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:40,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:40,514 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:40,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:40,522 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:40,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:40,548 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:40,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:40,566 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:40,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:40,591 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:40,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:40,618 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:40,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:40,672 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:40,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:40,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 09:39:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:40,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:41,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495408254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:41,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:41,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 43 [2022-07-19 09:39:41,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486218692] [2022-07-19 09:39:41,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:41,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 09:39:41,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:41,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 09:39:41,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:39:41,397 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:42,596 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-07-19 09:39:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 09:39:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-19 09:39:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:42,597 INFO L225 Difference]: With dead ends: 70 [2022-07-19 09:39:42,597 INFO L226 Difference]: Without dead ends: 68 [2022-07-19 09:39:42,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1200, Invalid=4806, Unknown=0, NotChecked=0, Total=6006 [2022-07-19 09:39:42,601 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 122 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:42,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 188 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 600 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-07-19 09:39:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-19 09:39:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2022-07-19 09:39:42,615 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) [2022-07-19 09:39:42,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-07-19 09:39:42,615 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2022-07-19 09:39:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:42,616 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-07-19 09:39:42,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-07-19 09:39:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 09:39:42,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:42,623 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:42,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:42,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 09:39:42,836 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 10 times [2022-07-19 09:39:42,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:42,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864934414] [2022-07-19 09:39:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:42,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:42,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864934414] [2022-07-19 09:39:42,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864934414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592147243] [2022-07-19 09:39:42,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:39:42,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:42,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:42,920 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:42,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 09:39:42,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:39:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 09:39:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:43,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 88 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:43,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592147243] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:43,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:43,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 24 [2022-07-19 09:39:43,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563727432] [2022-07-19 09:39:43,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:43,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 09:39:43,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 09:39:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2022-07-19 09:39:43,223 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 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) [2022-07-19 09:39:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:43,309 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-07-19 09:39:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 09:39:43,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-19 09:39:43,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:43,311 INFO L225 Difference]: With dead ends: 104 [2022-07-19 09:39:43,311 INFO L226 Difference]: Without dead ends: 63 [2022-07-19 09:39:43,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:39:43,311 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:43,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 90 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-19 09:39:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-07-19 09:39:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-07-19 09:39:43,322 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2022-07-19 09:39:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:43,322 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-07-19 09:39:43,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 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) [2022-07-19 09:39:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-07-19 09:39:43,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 09:39:43,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:43,324 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:43,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 09:39:43,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 09:39:43,532 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:43,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 11 times [2022-07-19 09:39:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:43,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141411829] [2022-07-19 09:39:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:43,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:43,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141411829] [2022-07-19 09:39:43,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141411829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:43,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878319767] [2022-07-19 09:39:43,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:39:43,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:43,852 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:43,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 09:39:43,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-19 09:39:43,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-19 09:39:43,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:43,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:44,026 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:44,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:44,037 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:44,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:44,068 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:44,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:44,078 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:44,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:44,109 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:44,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:44,119 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:44,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:44,151 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:44,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:44,160 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:44,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:44,197 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:44,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:44,205 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:44,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:44,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:39:44,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:44,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:39:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:44,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:45,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 09:39:45,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 09:39:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 36 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:45,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878319767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:45,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:45,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 42 [2022-07-19 09:39:45,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103681095] [2022-07-19 09:39:45,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:45,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 09:39:45,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:45,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 09:39:45,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 09:39:45,187 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 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) [2022-07-19 09:39:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:46,302 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2022-07-19 09:39:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 09:39:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 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 60 [2022-07-19 09:39:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:46,302 INFO L225 Difference]: With dead ends: 79 [2022-07-19 09:39:46,303 INFO L226 Difference]: Without dead ends: 77 [2022-07-19 09:39:46,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 106 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1124, Invalid=4576, Unknown=0, NotChecked=0, Total=5700 [2022-07-19 09:39:46,307 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:46,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 253 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 595 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2022-07-19 09:39:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-19 09:39:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2022-07-19 09:39:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-07-19 09:39:46,318 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2022-07-19 09:39:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:46,318 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-07-19 09:39:46,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 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) [2022-07-19 09:39:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-07-19 09:39:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 09:39:46,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:46,319 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:46,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:46,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 09:39:46,531 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 12 times [2022-07-19 09:39:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:46,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987317497] [2022-07-19 09:39:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:46,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:46,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:46,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987317497] [2022-07-19 09:39:46,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987317497] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:46,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38040823] [2022-07-19 09:39:46,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:39:46,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:46,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:46,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:46,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 09:39:46,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-19 09:39:46,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:46,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 09:39:46,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:46,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:47,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38040823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:47,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:47,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 27 [2022-07-19 09:39:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939686616] [2022-07-19 09:39:47,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 09:39:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:47,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 09:39:47,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-07-19 09:39:47,100 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:47,213 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-07-19 09:39:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 09:39:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-19 09:39:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:47,213 INFO L225 Difference]: With dead ends: 116 [2022-07-19 09:39:47,213 INFO L226 Difference]: Without dead ends: 71 [2022-07-19 09:39:47,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2022-07-19 09:39:47,214 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:47,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 96 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-19 09:39:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-07-19 09:39:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-19 09:39:47,220 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2022-07-19 09:39:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:47,220 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-19 09:39:47,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:47,220 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-19 09:39:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 09:39:47,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:47,221 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:47,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 09:39:47,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 09:39:47,432 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 13 times [2022-07-19 09:39:47,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:47,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413516406] [2022-07-19 09:39:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:47,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:47,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:47,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413516406] [2022-07-19 09:39:47,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413516406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:47,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582410798] [2022-07-19 09:39:47,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:39:47,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:47,784 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:47,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 09:39:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-19 09:39:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:47,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:47,927 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:47,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:47,937 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:47,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:47,969 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:47,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:47,980 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:47,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:48,018 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:48,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:48,029 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:48,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:48,060 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:48,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:48,070 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:48,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:48,114 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:48,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:48,124 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:48,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:48,156 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:48,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:48,165 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:48,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:48,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:39:48,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:48,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:39:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:48,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:49,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 09:39:49,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 09:39:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 42 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:49,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582410798] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:49,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:49,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 45 [2022-07-19 09:39:49,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624265471] [2022-07-19 09:39:49,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:49,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 09:39:49,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 09:39:49,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 09:39:49,327 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:54,624 INFO L93 Difference]: Finished difference Result 242 states and 288 transitions. [2022-07-19 09:39:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-07-19 09:39:54,625 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-19 09:39:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:54,626 INFO L225 Difference]: With dead ends: 242 [2022-07-19 09:39:54,626 INFO L226 Difference]: Without dead ends: 240 [2022-07-19 09:39:54,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 140 SyntacticMatches, 16 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13665 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5370, Invalid=31302, Unknown=0, NotChecked=0, Total=36672 [2022-07-19 09:39:54,631 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 246 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:54,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 443 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1042 Invalid, 0 Unknown, 277 Unchecked, 0.7s Time] [2022-07-19 09:39:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-19 09:39:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 73. [2022-07-19 09:39:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 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) [2022-07-19 09:39:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-07-19 09:39:54,646 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2022-07-19 09:39:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:54,646 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-07-19 09:39:54,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-07-19 09:39:54,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 09:39:54,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:54,647 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:54,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-19 09:39:54,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 09:39:54,863 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 14 times [2022-07-19 09:39:54,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:54,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722959783] [2022-07-19 09:39:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:54,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:54,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:54,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722959783] [2022-07-19 09:39:54,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722959783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:54,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807358636] [2022-07-19 09:39:54,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:39:54,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:54,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:54,961 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:54,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 09:39:55,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:39:55,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:55,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 09:39:55,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:55,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 150 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:55,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807358636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:55,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:55,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 30 [2022-07-19 09:39:55,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757384433] [2022-07-19 09:39:55,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:55,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 09:39:55,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 09:39:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=524, Unknown=0, NotChecked=0, Total=870 [2022-07-19 09:39:55,386 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:55,513 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2022-07-19 09:39:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 09:39:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-19 09:39:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:55,514 INFO L225 Difference]: With dead ends: 128 [2022-07-19 09:39:55,514 INFO L226 Difference]: Without dead ends: 79 [2022-07-19 09:39:55,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=368, Invalid=562, Unknown=0, NotChecked=0, Total=930 [2022-07-19 09:39:55,515 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:55,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 90 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:39:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-19 09:39:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-07-19 09:39:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-07-19 09:39:55,528 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 72 [2022-07-19 09:39:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:55,529 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-07-19 09:39:55,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:39:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-07-19 09:39:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 09:39:55,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:55,529 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:55,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 09:39:55,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:55,730 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:55,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:55,731 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 15 times [2022-07-19 09:39:55,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:55,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792153357] [2022-07-19 09:39:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:55,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:56,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:56,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792153357] [2022-07-19 09:39:56,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792153357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:56,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065640303] [2022-07-19 09:39:56,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:39:56,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:56,038 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:39:56,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 09:39:56,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-19 09:39:56,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:39:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-19 09:39:56,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:56,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:39:56,368 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:56,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:56,379 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:56,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:56,410 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:56,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:56,420 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:56,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:56,452 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:56,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:56,463 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:56,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:56,505 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:56,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:56,514 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:56,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:56,539 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:56,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:56,548 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:56,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:56,573 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:56,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:56,581 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:56,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:56,605 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:39:56,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:39:56,615 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:56,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:56,690 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:39:56,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:39:57,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 09:39:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:57,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:58,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-19 09:39:58,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2022-07-19 09:39:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 48 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:39:58,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065640303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:39:58,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:39:58,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 59 [2022-07-19 09:39:58,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329432173] [2022-07-19 09:39:58,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:58,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-19 09:39:58,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-19 09:39:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2856, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 09:39:58,402 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:00,999 INFO L93 Difference]: Finished difference Result 203 states and 218 transitions. [2022-07-19 09:40:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-07-19 09:40:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-19 09:40:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:01,000 INFO L225 Difference]: With dead ends: 203 [2022-07-19 09:40:01,000 INFO L226 Difference]: Without dead ends: 201 [2022-07-19 09:40:01,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 159 SyntacticMatches, 16 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6246 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2516, Invalid=16390, Unknown=0, NotChecked=0, Total=18906 [2022-07-19 09:40:01,002 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 354 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:01,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 486 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 896 Invalid, 0 Unknown, 420 Unchecked, 0.6s Time] [2022-07-19 09:40:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-19 09:40:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 121. [2022-07-19 09:40:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0416666666666667) internal successors, (125), 120 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) [2022-07-19 09:40:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-07-19 09:40:01,019 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 76 [2022-07-19 09:40:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:01,020 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-07-19 09:40:01,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-07-19 09:40:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-19 09:40:01,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:01,021 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:01,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:01,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:01,224 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:01,224 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 16 times [2022-07-19 09:40:01,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:01,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356233577] [2022-07-19 09:40:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:01,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 28 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:01,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:01,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356233577] [2022-07-19 09:40:01,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356233577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:01,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146181655] [2022-07-19 09:40:01,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:40:01,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:01,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:01,532 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:01,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 09:40:01,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:40:01,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:01,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-19 09:40:01,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:01,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:01,686 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:01,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:01,696 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:01,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:01,728 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:01,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:01,738 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:01,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:01,771 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:01,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:01,781 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:01,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:01,814 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:01,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:01,825 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:01,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:01,858 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:01,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:01,868 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:01,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:01,902 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:01,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:01,913 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:01,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:01,947 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:01,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:01,957 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:01,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:01,992 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:01,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:02,003 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:02,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:40:02,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:02,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:40:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 28 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:02,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:03,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 09:40:03,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 09:40:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 54 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:03,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146181655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:03,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:03,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 53 [2022-07-19 09:40:03,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694912438] [2022-07-19 09:40:03,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:03,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 09:40:03,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:03,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 09:40:03,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2369, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 09:40:03,357 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:06,234 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2022-07-19 09:40:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-19 09:40:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-07-19 09:40:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:06,235 INFO L225 Difference]: With dead ends: 179 [2022-07-19 09:40:06,235 INFO L226 Difference]: Without dead ends: 177 [2022-07-19 09:40:06,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 154 SyntacticMatches, 22 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5609 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2913, Invalid=12587, Unknown=0, NotChecked=0, Total=15500 [2022-07-19 09:40:06,240 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 326 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:06,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 472 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1290 Invalid, 0 Unknown, 23 Unchecked, 0.6s Time] [2022-07-19 09:40:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-19 09:40:06,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 121. [2022-07-19 09:40:06,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0416666666666667) internal successors, (125), 120 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) [2022-07-19 09:40:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-07-19 09:40:06,257 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 84 [2022-07-19 09:40:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:06,258 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-07-19 09:40:06,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-07-19 09:40:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-19 09:40:06,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:06,271 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:06,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-19 09:40:06,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:06,487 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2110702651, now seen corresponding path program 17 times [2022-07-19 09:40:06,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:06,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43323029] [2022-07-19 09:40:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:06,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:06,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43323029] [2022-07-19 09:40:06,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43323029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110311480] [2022-07-19 09:40:06,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:40:06,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:06,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:06,604 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:06,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 09:40:06,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-19 09:40:06,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 09:40:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:07,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 228 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:07,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110311480] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:07,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:07,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 24] total 36 [2022-07-19 09:40:07,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563366656] [2022-07-19 09:40:07,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:07,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 09:40:07,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:07,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 09:40:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=761, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 09:40:07,325 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:07,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:07,508 INFO L93 Difference]: Finished difference Result 222 states and 229 transitions. [2022-07-19 09:40:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 09:40:07,509 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-07-19 09:40:07,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:07,509 INFO L225 Difference]: With dead ends: 222 [2022-07-19 09:40:07,509 INFO L226 Difference]: Without dead ends: 95 [2022-07-19 09:40:07,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=855, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 09:40:07,510 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:07,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 132 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:40:07,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-19 09:40:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-07-19 09:40:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-07-19 09:40:07,522 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 88 [2022-07-19 09:40:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:07,522 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-07-19 09:40:07,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-07-19 09:40:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-19 09:40:07,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:07,523 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:07,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:07,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:07,740 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:07,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 18 times [2022-07-19 09:40:07,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:07,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453603598] [2022-07-19 09:40:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:07,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:08,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453603598] [2022-07-19 09:40:08,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453603598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659260961] [2022-07-19 09:40:08,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:40:08,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:08,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:08,109 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:08,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 09:40:08,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-19 09:40:08,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:08,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-19 09:40:08,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:08,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:08,558 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:08,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:08,569 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:08,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:08,583 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:08,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:08,594 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:08,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:08,609 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:08,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:08,620 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:08,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:08,634 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:08,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:08,644 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:08,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:08,656 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:08,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:08,667 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:08,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:08,683 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:08,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:08,695 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:08,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:08,710 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:08,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:08,722 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:08,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:08,737 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:08,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:08,747 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:08,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:08,762 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:08,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:08,772 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:08,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:08,836 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-19 09:40:08,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 09:40:09,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:40:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:09,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 60 proven. 371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:10,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659260961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:10,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:10,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27, 28] total 43 [2022-07-19 09:40:10,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600224842] [2022-07-19 09:40:10,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:10,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 09:40:10,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:10,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 09:40:10,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:40:10,162 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 43 states, 43 states have (on average 4.255813953488372) internal successors, (183), 43 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:12,106 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2022-07-19 09:40:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-19 09:40:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.255813953488372) internal successors, (183), 43 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-19 09:40:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:12,108 INFO L225 Difference]: With dead ends: 111 [2022-07-19 09:40:12,108 INFO L226 Difference]: Without dead ends: 109 [2022-07-19 09:40:12,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 174 SyntacticMatches, 22 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1737, Invalid=7193, Unknown=0, NotChecked=0, Total=8930 [2022-07-19 09:40:12,109 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 295 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:12,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 363 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 09:40:12,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-19 09:40:12,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2022-07-19 09:40:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.03125) internal successors, (99), 96 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) [2022-07-19 09:40:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-07-19 09:40:12,126 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2022-07-19 09:40:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:12,127 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-07-19 09:40:12,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.255813953488372) internal successors, (183), 43 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-07-19 09:40:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-19 09:40:12,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:12,128 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:12,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:12,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:12,343 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 19 times [2022-07-19 09:40:12,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:12,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527962559] [2022-07-19 09:40:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:12,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:12,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:12,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527962559] [2022-07-19 09:40:12,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527962559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:12,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089992028] [2022-07-19 09:40:12,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:40:12,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:12,489 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:12,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 09:40:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 09:40:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:12,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 273 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:13,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089992028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:13,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:13,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 26] total 39 [2022-07-19 09:40:13,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401272107] [2022-07-19 09:40:13,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:13,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 09:40:13,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:13,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 09:40:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=896, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 09:40:13,153 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:13,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:13,332 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2022-07-19 09:40:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 09:40:13,332 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have 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 [2022-07-19 09:40:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:13,333 INFO L225 Difference]: With dead ends: 164 [2022-07-19 09:40:13,333 INFO L226 Difference]: Without dead ends: 103 [2022-07-19 09:40:13,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=946, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 09:40:13,333 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 91 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:13,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 130 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:40:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-19 09:40:13,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-07-19 09:40:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 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) [2022-07-19 09:40:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-07-19 09:40:13,352 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 96 [2022-07-19 09:40:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:13,352 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-07-19 09:40:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-07-19 09:40:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-19 09:40:13,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:13,353 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:13,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:13,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:13,569 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:13,569 INFO L85 PathProgramCache]: Analyzing trace with hash 137728423, now seen corresponding path program 20 times [2022-07-19 09:40:13,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:13,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136346371] [2022-07-19 09:40:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:13,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 34 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:13,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:13,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136346371] [2022-07-19 09:40:13,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136346371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:13,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115703804] [2022-07-19 09:40:13,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:40:13,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:13,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:13,994 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:13,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 09:40:14,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:40:14,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-19 09:40:14,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:14,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:14,214 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,225 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,256 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,265 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,293 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,303 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,333 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,342 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,375 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,384 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,415 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,432 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,468 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,478 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,513 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,523 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,560 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,569 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,607 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:14,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:14,617 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:14,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:14,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:40:14,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:15,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:40:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 34 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:15,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:16,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 09:40:16,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 09:40:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 66 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:16,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115703804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:16,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:16,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30, 30] total 62 [2022-07-19 09:40:16,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760436017] [2022-07-19 09:40:16,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:16,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-19 09:40:16,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:16,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-19 09:40:16,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=3286, Unknown=0, NotChecked=0, Total=3782 [2022-07-19 09:40:16,683 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 62 states, 62 states have (on average 3.9838709677419355) internal successors, (247), 62 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:19,081 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-07-19 09:40:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-19 09:40:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.9838709677419355) internal successors, (247), 62 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-07-19 09:40:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:19,085 INFO L225 Difference]: With dead ends: 119 [2022-07-19 09:40:19,085 INFO L226 Difference]: Without dead ends: 117 [2022-07-19 09:40:19,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 185 SyntacticMatches, 27 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4876 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2557, Invalid=11485, Unknown=0, NotChecked=0, Total=14042 [2022-07-19 09:40:19,090 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 295 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:19,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 541 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1551 Invalid, 0 Unknown, 27 Unchecked, 0.6s Time] [2022-07-19 09:40:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-19 09:40:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2022-07-19 09:40:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-07-19 09:40:19,111 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2022-07-19 09:40:19,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:19,111 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-07-19 09:40:19,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.9838709677419355) internal successors, (247), 62 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-07-19 09:40:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 09:40:19,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:19,112 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:19,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:19,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-19 09:40:19,328 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash -216366051, now seen corresponding path program 21 times [2022-07-19 09:40:19,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:19,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646812802] [2022-07-19 09:40:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:19,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 243 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646812802] [2022-07-19 09:40:19,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646812802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263662983] [2022-07-19 09:40:19,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:40:19,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:19,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:19,447 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:19,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 09:40:19,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-19 09:40:19,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:19,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 09:40:19,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:20,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 322 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:20,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263662983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:20,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:20,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28, 28] total 42 [2022-07-19 09:40:20,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136359583] [2022-07-19 09:40:20,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:20,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 09:40:20,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:20,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 09:40:20,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1042, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 09:40:20,458 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 42 states, 42 states have (on average 4.904761904761905) internal successors, (206), 42 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) [2022-07-19 09:40:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:20,646 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2022-07-19 09:40:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 09:40:20,647 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.904761904761905) internal successors, (206), 42 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 104 [2022-07-19 09:40:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:20,647 INFO L225 Difference]: With dead ends: 176 [2022-07-19 09:40:20,647 INFO L226 Difference]: Without dead ends: 111 [2022-07-19 09:40:20,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:40:20,648 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:20,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 180 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:40:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-19 09:40:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-07-19 09:40:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-07-19 09:40:20,666 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2022-07-19 09:40:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:20,667 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-07-19 09:40:20,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.904761904761905) internal successors, (206), 42 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) [2022-07-19 09:40:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-07-19 09:40:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-19 09:40:20,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:20,667 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:20,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:20,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 09:40:20,884 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 22 times [2022-07-19 09:40:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:20,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429284027] [2022-07-19 09:40:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:20,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 72 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:21,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:21,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429284027] [2022-07-19 09:40:21,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429284027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:21,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705442325] [2022-07-19 09:40:21,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:40:21,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:21,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:21,795 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:21,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 09:40:21,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:40:21,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:21,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 107 conjunts are in the unsatisfiable core [2022-07-19 09:40:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:21,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:22,002 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,010 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,039 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,048 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,083 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,091 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,126 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,135 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,170 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,179 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,214 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,230 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,266 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,275 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,312 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,323 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,362 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,380 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,418 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,427 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,466 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:22,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:22,477 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:22,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:22,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:40:22,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:23,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:40:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 37 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:23,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:25,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-19 09:40:25,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2022-07-19 09:40:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 72 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:25,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705442325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:25,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 91 [2022-07-19 09:40:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311904979] [2022-07-19 09:40:25,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:25,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-19 09:40:25,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-19 09:40:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1257, Invalid=6933, Unknown=0, NotChecked=0, Total=8190 [2022-07-19 09:40:25,189 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 91 states, 91 states have (on average 3.4505494505494507) internal successors, (314), 91 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:28,860 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2022-07-19 09:40:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-19 09:40:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.4505494505494507) internal successors, (314), 91 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-19 09:40:28,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:28,861 INFO L225 Difference]: With dead ends: 126 [2022-07-19 09:40:28,862 INFO L226 Difference]: Without dead ends: 124 [2022-07-19 09:40:28,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 180 SyntacticMatches, 23 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8316 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3412, Invalid=15770, Unknown=0, NotChecked=0, Total=19182 [2022-07-19 09:40:28,863 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 287 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:28,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 583 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1560 Invalid, 0 Unknown, 473 Unchecked, 0.7s Time] [2022-07-19 09:40:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-19 09:40:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2022-07-19 09:40:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-07-19 09:40:28,879 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 108 [2022-07-19 09:40:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:28,879 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-07-19 09:40:28,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.4505494505494507) internal successors, (314), 91 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-07-19 09:40:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-19 09:40:28,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:28,880 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:28,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-19 09:40:29,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 09:40:29,089 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:29,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:29,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 23 times [2022-07-19 09:40:29,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:29,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559727553] [2022-07-19 09:40:29,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:29,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:29,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:29,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559727553] [2022-07-19 09:40:29,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559727553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:29,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318929087] [2022-07-19 09:40:29,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:40:29,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:29,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:29,248 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:29,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 09:40:29,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-19 09:40:29,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:29,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 09:40:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:29,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 375 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:30,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318929087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:30,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:30,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 45 [2022-07-19 09:40:30,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617350871] [2022-07-19 09:40:30,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:30,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 09:40:30,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 09:40:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=1199, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 09:40:30,246 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:30,461 INFO L93 Difference]: Finished difference Result 188 states and 193 transitions. [2022-07-19 09:40:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 09:40:30,461 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-19 09:40:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:30,462 INFO L225 Difference]: With dead ends: 188 [2022-07-19 09:40:30,462 INFO L226 Difference]: Without dead ends: 119 [2022-07-19 09:40:30,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=813, Invalid=1257, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 09:40:30,462 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:30,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 180 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:40:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-19 09:40:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-07-19 09:40:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 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) [2022-07-19 09:40:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-07-19 09:40:30,478 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2022-07-19 09:40:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:30,478 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-07-19 09:40:30,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:30,478 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-07-19 09:40:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-19 09:40:30,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:30,479 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:30,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:30,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:30,697 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 24 times [2022-07-19 09:40:30,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:30,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626917885] [2022-07-19 09:40:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:30,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 40 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:31,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:31,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626917885] [2022-07-19 09:40:31,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626917885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:31,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646846714] [2022-07-19 09:40:31,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:40:31,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:31,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:31,237 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:31,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 09:40:32,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-19 09:40:32,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:32,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-19 09:40:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:32,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:32,621 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,630 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,644 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,654 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,666 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,675 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,688 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,697 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,710 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,719 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,732 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,742 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,754 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,764 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,776 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,786 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,798 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,808 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,820 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,830 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,843 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,852 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,865 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:32,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:32,875 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:32,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:32,943 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-19 09:40:32,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 09:40:33,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:40:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 40 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:33,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 78 proven. 638 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:34,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646846714] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:34,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:34,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 33, 34] total 52 [2022-07-19 09:40:34,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188092024] [2022-07-19 09:40:34,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:34,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-19 09:40:34,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:34,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-19 09:40:34,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2022-07-19 09:40:34,698 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 52 states, 52 states have (on average 4.4423076923076925) internal successors, (231), 52 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:37,745 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2022-07-19 09:40:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-19 09:40:37,745 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.4423076923076925) internal successors, (231), 52 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-07-19 09:40:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:37,746 INFO L225 Difference]: With dead ends: 135 [2022-07-19 09:40:37,746 INFO L226 Difference]: Without dead ends: 133 [2022-07-19 09:40:37,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 222 SyntacticMatches, 28 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2520, Invalid=10820, Unknown=0, NotChecked=0, Total=13340 [2022-07-19 09:40:37,747 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 469 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:37,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 648 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 09:40:37,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-19 09:40:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 121. [2022-07-19 09:40:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-07-19 09:40:37,778 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2022-07-19 09:40:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:37,778 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-07-19 09:40:37,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.4423076923076925) internal successors, (231), 52 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-07-19 09:40:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-19 09:40:37,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:37,780 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:37,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-19 09:40:38,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 09:40:38,002 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1492478465, now seen corresponding path program 25 times [2022-07-19 09:40:38,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:38,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052508243] [2022-07-19 09:40:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:38,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:38,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:38,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052508243] [2022-07-19 09:40:38,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052508243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:38,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20478953] [2022-07-19 09:40:38,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:40:38,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:38,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:38,224 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:38,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 09:40:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 09:40:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:38,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 432 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:39,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20478953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:39,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:39,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32, 32] total 48 [2022-07-19 09:40:39,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92668305] [2022-07-19 09:40:39,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:39,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 09:40:39,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:39,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 09:40:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=1367, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 09:40:39,138 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 48 states, 48 states have (on average 4.958333333333333) internal successors, (238), 48 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:39,324 INFO L93 Difference]: Finished difference Result 200 states and 205 transitions. [2022-07-19 09:40:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 09:40:39,324 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.958333333333333) internal successors, (238), 48 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-19 09:40:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:39,325 INFO L225 Difference]: With dead ends: 200 [2022-07-19 09:40:39,325 INFO L226 Difference]: Without dead ends: 127 [2022-07-19 09:40:39,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 09:40:39,328 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 100 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:39,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 150 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:40:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-19 09:40:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-07-19 09:40:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-07-19 09:40:39,354 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 120 [2022-07-19 09:40:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:39,354 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-07-19 09:40:39,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.958333333333333) internal successors, (238), 48 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-07-19 09:40:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-19 09:40:39,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:39,355 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:39,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:39,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 09:40:39,561 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:39,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1678830778, now seen corresponding path program 26 times [2022-07-19 09:40:39,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:39,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879471196] [2022-07-19 09:40:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:39,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 80 proven. 747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879471196] [2022-07-19 09:40:40,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879471196] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973039860] [2022-07-19 09:40:40,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:40:40,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:40,881 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:40,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 09:40:41,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:40:41,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-19 09:40:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:41,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:41,140 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,149 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,162 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,170 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,183 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,191 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,208 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,216 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,228 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,259 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,272 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,281 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,292 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,300 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,312 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,326 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,338 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,346 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,358 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,367 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,398 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,411 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,431 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,443 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,465 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:41,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:41,478 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:41,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:41,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:40:41,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 09:40:42,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:40:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 43 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:42,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:44,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-19 09:40:44,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2022-07-19 09:40:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 84 proven. 743 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:44,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973039860] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:44,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:44,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 87 [2022-07-19 09:40:44,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993926251] [2022-07-19 09:40:44,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:44,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-19 09:40:44,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-19 09:40:44,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=6526, Unknown=0, NotChecked=0, Total=7482 [2022-07-19 09:40:44,470 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 87 states, 87 states have (on average 4.091954022988506) internal successors, (356), 87 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:47,527 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-07-19 09:40:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-19 09:40:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.091954022988506) internal successors, (356), 87 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-07-19 09:40:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:47,529 INFO L225 Difference]: With dead ends: 137 [2022-07-19 09:40:47,529 INFO L226 Difference]: Without dead ends: 135 [2022-07-19 09:40:47,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 224 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7433 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3405, Invalid=15227, Unknown=0, NotChecked=0, Total=18632 [2022-07-19 09:40:47,530 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 415 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 723 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:47,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 956 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1745 Invalid, 0 Unknown, 723 Unchecked, 0.9s Time] [2022-07-19 09:40:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-19 09:40:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2022-07-19 09:40:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-07-19 09:40:47,556 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 124 [2022-07-19 09:40:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:47,556 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-07-19 09:40:47,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.091954022988506) internal successors, (356), 87 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:47,557 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-07-19 09:40:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-19 09:40:47,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:47,557 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:47,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:47,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:47,771 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash -321118800, now seen corresponding path program 27 times [2022-07-19 09:40:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900522369] [2022-07-19 09:40:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:47,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:47,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900522369] [2022-07-19 09:40:47,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900522369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:47,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903075899] [2022-07-19 09:40:47,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:40:47,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:47,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:48,020 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:48,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 09:40:49,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-19 09:40:49,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 09:40:49,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:49,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 493 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:50,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903075899] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:50,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:50,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 35] total 53 [2022-07-19 09:40:50,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132165832] [2022-07-19 09:40:50,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:50,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 09:40:50,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 09:40:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1072, Invalid=1684, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 09:40:50,322 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 53 states, 53 states have (on average 4.830188679245283) internal successors, (256), 53 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:50,661 INFO L93 Difference]: Finished difference Result 217 states and 224 transitions. [2022-07-19 09:40:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 09:40:50,661 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.830188679245283) internal successors, (256), 53 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-19 09:40:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:50,662 INFO L225 Difference]: With dead ends: 217 [2022-07-19 09:40:50,662 INFO L226 Difference]: Without dead ends: 140 [2022-07-19 09:40:50,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1829, Invalid=3141, Unknown=0, NotChecked=0, Total=4970 [2022-07-19 09:40:50,663 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 126 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:50,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 188 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:40:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-19 09:40:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2022-07-19 09:40:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-07-19 09:40:50,682 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2022-07-19 09:40:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:50,682 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-07-19 09:40:50,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.830188679245283) internal successors, (256), 53 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-07-19 09:40:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-19 09:40:50,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:50,683 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:50,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:50,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:50,895 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:50,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1893103253, now seen corresponding path program 28 times [2022-07-19 09:40:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:50,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334308122] [2022-07-19 09:40:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:50,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 83 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:51,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:51,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334308122] [2022-07-19 09:40:51,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334308122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:51,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242512337] [2022-07-19 09:40:51,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:40:51,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:51,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:51,932 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:51,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 09:40:52,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:40:52,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:40:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 131 conjunts are in the unsatisfiable core [2022-07-19 09:40:52,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:52,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:40:52,118 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,139 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,151 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,162 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,174 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,183 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,195 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,204 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,221 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,236 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,249 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,256 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,270 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,278 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,290 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,299 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,311 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,320 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,335 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,345 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,367 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,378 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,390 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,399 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,411 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,420 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,432 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:52,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:40:52,440 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:40:52,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:40:52,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 09:40:53,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:40:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 46 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:53,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:55,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-19 09:40:55,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2022-07-19 09:40:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 90 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:55,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242512337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:55,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:55,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 90 [2022-07-19 09:40:55,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542911118] [2022-07-19 09:40:55,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:55,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-19 09:40:55,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-19 09:40:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1020, Invalid=6990, Unknown=0, NotChecked=0, Total=8010 [2022-07-19 09:40:55,475 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 90 states, 90 states have (on average 4.166666666666667) internal successors, (375), 90 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:58,471 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2022-07-19 09:40:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-19 09:40:58,472 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.166666666666667) internal successors, (375), 90 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-07-19 09:40:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:58,473 INFO L225 Difference]: With dead ends: 152 [2022-07-19 09:40:58,473 INFO L226 Difference]: Without dead ends: 150 [2022-07-19 09:40:58,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 243 SyntacticMatches, 30 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8388 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3813, Invalid=17357, Unknown=0, NotChecked=0, Total=21170 [2022-07-19 09:40:58,475 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 688 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 917 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:58,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 1070 Invalid, 3262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1976 Invalid, 0 Unknown, 917 Unchecked, 0.9s Time] [2022-07-19 09:40:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-19 09:40:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2022-07-19 09:40:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-07-19 09:40:58,495 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 132 [2022-07-19 09:40:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:58,495 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-07-19 09:40:58,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.166666666666667) internal successors, (375), 90 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:40:58,496 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-07-19 09:40:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-19 09:40:58,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:58,496 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:58,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-19 09:40:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:58,710 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1812265441, now seen corresponding path program 29 times [2022-07-19 09:40:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:58,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130844789] [2022-07-19 09:40:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 451 proven. 557 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:40:58,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:58,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130844789] [2022-07-19 09:40:58,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130844789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:58,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671510291] [2022-07-19 09:40:58,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:40:58,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:58,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:58,945 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:40:58,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 09:41:00,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-07-19 09:41:00,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:00,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 09:41:00,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 512 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:00,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 558 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:00,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671510291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:00,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:00,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 36, 36] total 54 [2022-07-19 09:41:00,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097035504] [2022-07-19 09:41:00,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:00,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-19 09:41:00,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-19 09:41:00,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1126, Invalid=1736, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 09:41:00,929 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 54 states, 54 states have (on average 5.0) internal successors, (270), 54 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:01,147 INFO L93 Difference]: Finished difference Result 234 states and 239 transitions. [2022-07-19 09:41:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 09:41:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.0) internal successors, (270), 54 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-07-19 09:41:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:01,148 INFO L225 Difference]: With dead ends: 234 [2022-07-19 09:41:01,148 INFO L226 Difference]: Without dead ends: 148 [2022-07-19 09:41:01,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 252 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1164, Invalid=1806, Unknown=0, NotChecked=0, Total=2970 [2022-07-19 09:41:01,149 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 127 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:01,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 214 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:41:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-19 09:41:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2022-07-19 09:41:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-07-19 09:41:01,168 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 136 [2022-07-19 09:41:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:01,169 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-07-19 09:41:01,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.0) internal successors, (270), 54 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-07-19 09:41:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-19 09:41:01,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:01,169 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:01,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:01,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:01,370 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1505000092, now seen corresponding path program 30 times [2022-07-19 09:41:01,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:01,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857442351] [2022-07-19 09:41:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:01,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 49 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:01,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857442351] [2022-07-19 09:41:01,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857442351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502164246] [2022-07-19 09:41:01,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:41:01,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:01,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:01,962 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:01,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 09:41:05,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-19 09:41:05,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 137 conjunts are in the unsatisfiable core [2022-07-19 09:41:05,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:05,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:41:05,129 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,153 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,165 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,174 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,203 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,213 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,226 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,236 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,248 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,262 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,274 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,283 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,296 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,305 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,330 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,339 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,351 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,361 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,373 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,384 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,396 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,406 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,419 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,428 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,441 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,450 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,473 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,482 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,495 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:05,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:05,504 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:05,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:05,582 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-19 09:41:05,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 09:41:06,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:41:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 49 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:06,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 96 proven. 977 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:07,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502164246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:07,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:07,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 39, 40] total 61 [2022-07-19 09:41:07,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322454323] [2022-07-19 09:41:07,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:07,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-19 09:41:07,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:07,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-19 09:41:07,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3085, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 09:41:07,603 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 61 states, 61 states have (on average 4.573770491803279) internal successors, (279), 61 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:12,235 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2022-07-19 09:41:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-19 09:41:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.573770491803279) internal successors, (279), 61 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-07-19 09:41:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:12,251 INFO L225 Difference]: With dead ends: 162 [2022-07-19 09:41:12,251 INFO L226 Difference]: Without dead ends: 160 [2022-07-19 09:41:12,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 270 SyntacticMatches, 34 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5883 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3447, Invalid=15185, Unknown=0, NotChecked=0, Total=18632 [2022-07-19 09:41:12,253 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 400 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:12,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 928 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 09:41:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-19 09:41:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2022-07-19 09:41:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 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) [2022-07-19 09:41:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-07-19 09:41:12,275 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2022-07-19 09:41:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:12,276 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-07-19 09:41:12,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.573770491803279) internal successors, (279), 61 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-07-19 09:41:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-19 09:41:12,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:12,276 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:12,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-19 09:41:12,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-19 09:41:12,480 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash 677505682, now seen corresponding path program 31 times [2022-07-19 09:41:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:12,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083373894] [2022-07-19 09:41:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:12,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 513 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:12,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083373894] [2022-07-19 09:41:12,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083373894] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:12,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580920802] [2022-07-19 09:41:12,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:41:12,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:12,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:12,697 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:12,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 09:41:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:12,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 09:41:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:13,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 627 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:13,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580920802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:13,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:13,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 38, 38] total 57 [2022-07-19 09:41:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794097087] [2022-07-19 09:41:13,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:13,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-19 09:41:13,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:13,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-19 09:41:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1255, Invalid=1937, Unknown=0, NotChecked=0, Total=3192 [2022-07-19 09:41:13,858 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 57 states, 57 states have (on average 5.017543859649122) internal successors, (286), 57 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:14,108 INFO L93 Difference]: Finished difference Result 246 states and 251 transitions. [2022-07-19 09:41:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 09:41:14,108 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.017543859649122) internal successors, (286), 57 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-19 09:41:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:14,109 INFO L225 Difference]: With dead ends: 246 [2022-07-19 09:41:14,109 INFO L226 Difference]: Without dead ends: 156 [2022-07-19 09:41:14,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 267 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1295, Invalid=2011, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 09:41:14,110 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 63 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:14,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 222 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:41:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-19 09:41:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2022-07-19 09:41:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 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) [2022-07-19 09:41:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-07-19 09:41:14,132 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 144 [2022-07-19 09:41:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:14,132 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-07-19 09:41:14,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.017543859649122) internal successors, (286), 57 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-07-19 09:41:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-19 09:41:14,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:14,133 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:14,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:14,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:14,349 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:14,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2089713741, now seen corresponding path program 32 times [2022-07-19 09:41:14,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:14,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388082575] [2022-07-19 09:41:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:14,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 52 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:14,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388082575] [2022-07-19 09:41:14,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388082575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:14,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558755250] [2022-07-19 09:41:14,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:41:14,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:14,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:14,991 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:14,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-19 09:41:15,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:41:15,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:15,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 147 conjunts are in the unsatisfiable core [2022-07-19 09:41:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:15,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:41:15,326 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,336 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,374 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,383 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,422 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,432 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,471 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,481 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,520 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,530 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,570 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,580 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,620 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,630 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,671 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,681 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,726 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,736 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,780 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,788 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,820 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,827 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,859 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,866 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,897 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,905 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,936 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:15,965 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:15,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:15,996 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:15,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:16,004 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:16,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:16,038 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:16,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:16,046 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:16,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:41:16,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:17,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:41:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 52 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:17,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:19,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 09:41:19,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 09:41:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 102 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:19,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558755250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:19,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:19,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 42, 42] total 84 [2022-07-19 09:41:19,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949452947] [2022-07-19 09:41:19,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:19,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-19 09:41:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:19,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-19 09:41:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=6173, Unknown=0, NotChecked=0, Total=6972 [2022-07-19 09:41:19,520 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 84 states, 84 states have (on average 4.369047619047619) internal successors, (367), 84 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:25,386 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-07-19 09:41:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-19 09:41:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.369047619047619) internal successors, (367), 84 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-07-19 09:41:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:25,387 INFO L225 Difference]: With dead ends: 170 [2022-07-19 09:41:25,387 INFO L226 Difference]: Without dead ends: 168 [2022-07-19 09:41:25,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 282 SyntacticMatches, 38 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9662 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=4721, Invalid=22339, Unknown=0, NotChecked=0, Total=27060 [2022-07-19 09:41:25,389 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 940 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 3351 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 4171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 3351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:25,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 1330 Invalid, 4171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 3351 Invalid, 0 Unknown, 39 Unchecked, 1.9s Time] [2022-07-19 09:41:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-19 09:41:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2022-07-19 09:41:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 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) [2022-07-19 09:41:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2022-07-19 09:41:25,412 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 148 [2022-07-19 09:41:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:25,412 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2022-07-19 09:41:25,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.369047619047619) internal successors, (367), 84 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2022-07-19 09:41:25,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-19 09:41:25,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:25,413 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:25,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-19 09:41:25,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:25,631 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1636847677, now seen corresponding path program 33 times [2022-07-19 09:41:25,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:25,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427810370] [2022-07-19 09:41:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:25,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 579 proven. 699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:25,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:25,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427810370] [2022-07-19 09:41:25,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427810370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:25,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663584820] [2022-07-19 09:41:25,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:41:25,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:25,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:25,945 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:25,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-19 09:41:33,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-19 09:41:33,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:33,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 09:41:33,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 648 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:33,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 700 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:34,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663584820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:34,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:34,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 40, 40] total 60 [2022-07-19 09:41:34,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8584516] [2022-07-19 09:41:34,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:34,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-19 09:41:34,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-19 09:41:34,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1391, Invalid=2149, Unknown=0, NotChecked=0, Total=3540 [2022-07-19 09:41:34,393 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 60 states, 60 states have (on average 5.033333333333333) internal successors, (302), 60 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:34,677 INFO L93 Difference]: Finished difference Result 258 states and 263 transitions. [2022-07-19 09:41:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 09:41:34,677 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 5.033333333333333) internal successors, (302), 60 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-07-19 09:41:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:34,678 INFO L225 Difference]: With dead ends: 258 [2022-07-19 09:41:34,678 INFO L226 Difference]: Without dead ends: 164 [2022-07-19 09:41:34,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1433, Invalid=2227, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 09:41:34,678 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:34,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 252 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:41:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-19 09:41:34,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2022-07-19 09:41:34,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-07-19 09:41:34,702 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2022-07-19 09:41:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:34,703 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-07-19 09:41:34,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.033333333333333) internal successors, (302), 60 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-07-19 09:41:34,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-19 09:41:34,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:34,703 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:34,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:34,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-19 09:41:34,923 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash 691296894, now seen corresponding path program 34 times [2022-07-19 09:41:34,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:34,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200563109] [2022-07-19 09:41:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:34,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 55 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:35,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:35,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200563109] [2022-07-19 09:41:35,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200563109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:35,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676411683] [2022-07-19 09:41:35,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:41:35,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:35,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:35,647 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:35,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-19 09:41:36,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:41:36,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 155 conjunts are in the unsatisfiable core [2022-07-19 09:41:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:36,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:41:36,151 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,161 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,201 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,210 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,250 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,259 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,301 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,311 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,352 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,361 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,403 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,413 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,457 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,467 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,510 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,520 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,566 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,577 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,623 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,645 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,678 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,685 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,714 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,721 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,750 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,756 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,787 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,793 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,828 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,835 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,865 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,872 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:36,902 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:36,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:36,919 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:36,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:41:37,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:37,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:41:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 55 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:37,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:39,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 09:41:39,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 09:41:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 108 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:39,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676411683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:39,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:39,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 44, 44] total 90 [2022-07-19 09:41:39,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429657392] [2022-07-19 09:41:39,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:39,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-19 09:41:39,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:39,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-19 09:41:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=888, Invalid=7122, Unknown=0, NotChecked=0, Total=8010 [2022-07-19 09:41:39,963 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 90 states, 90 states have (on average 4.3) internal successors, (387), 90 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:45,057 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2022-07-19 09:41:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-19 09:41:45,058 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.3) internal successors, (387), 90 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-07-19 09:41:45,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:45,058 INFO L225 Difference]: With dead ends: 179 [2022-07-19 09:41:45,058 INFO L226 Difference]: Without dead ends: 177 [2022-07-19 09:41:45,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 296 SyntacticMatches, 39 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10260 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5006, Invalid=24406, Unknown=0, NotChecked=0, Total=29412 [2022-07-19 09:41:45,060 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 402 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 3736 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 4151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 3736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:45,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 1537 Invalid, 4151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 3736 Invalid, 0 Unknown, 87 Unchecked, 1.4s Time] [2022-07-19 09:41:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-19 09:41:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2022-07-19 09:41:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-07-19 09:41:45,085 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2022-07-19 09:41:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:45,085 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-07-19 09:41:45,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.3) internal successors, (387), 90 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-07-19 09:41:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-19 09:41:45,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:45,086 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:45,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:45,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-19 09:41:45,306 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1934297460, now seen corresponding path program 35 times [2022-07-19 09:41:45,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:45,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238354593] [2022-07-19 09:41:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 649 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:45,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:45,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238354593] [2022-07-19 09:41:45,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238354593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:45,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260233784] [2022-07-19 09:41:45,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:41:45,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:45,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:45,565 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:45,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-19 09:41:47,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-19 09:41:47,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:47,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 09:41:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:48,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 777 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:48,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260233784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:48,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:48,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 42, 42] total 63 [2022-07-19 09:41:48,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021137498] [2022-07-19 09:41:48,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:48,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-19 09:41:48,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-19 09:41:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1534, Invalid=2372, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 09:41:48,593 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 63 states, 63 states have (on average 5.0476190476190474) internal successors, (318), 63 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:48,889 INFO L93 Difference]: Finished difference Result 270 states and 275 transitions. [2022-07-19 09:41:48,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 09:41:48,889 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.0476190476190474) internal successors, (318), 63 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-07-19 09:41:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:48,890 INFO L225 Difference]: With dead ends: 270 [2022-07-19 09:41:48,890 INFO L226 Difference]: Without dead ends: 172 [2022-07-19 09:41:48,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 297 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1578, Invalid=2454, Unknown=0, NotChecked=0, Total=4032 [2022-07-19 09:41:48,891 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 60 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:48,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 248 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:41:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-19 09:41:48,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2022-07-19 09:41:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-07-19 09:41:48,917 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 160 [2022-07-19 09:41:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:48,917 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-07-19 09:41:48,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.0476190476190474) internal successors, (318), 63 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-07-19 09:41:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-19 09:41:48,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:48,918 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:48,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:49,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-19 09:41:49,124 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1178416849, now seen corresponding path program 36 times [2022-07-19 09:41:49,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:49,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550313319] [2022-07-19 09:41:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:49,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 58 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:49,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550313319] [2022-07-19 09:41:49,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550313319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709460687] [2022-07-19 09:41:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:41:49,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:49,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:49,862 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:49,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-19 09:41:56,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-19 09:41:56,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:56,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 164 conjunts are in the unsatisfiable core [2022-07-19 09:41:56,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:56,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:41:56,637 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:56,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:56,647 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:56,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:56,709 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:56,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:56,719 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:56,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:56,760 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:56,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:56,770 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:56,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:56,811 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:56,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:56,822 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:56,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:56,864 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:56,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:56,874 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:56,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:56,916 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:56,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:56,926 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:56,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:56,971 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:56,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:56,981 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:56,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,027 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,041 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,094 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,107 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,161 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,173 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,228 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,241 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,286 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,297 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,343 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,353 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,399 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,409 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,456 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,468 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,517 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,529 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,576 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,586 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,635 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:41:57,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:41:57,645 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:57,779 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:41:57,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:41:59,362 INFO L356 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2022-07-19 09:41:59,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 15 [2022-07-19 09:41:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:59,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:42:04,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-19 09:42:04,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2022-07-19 09:42:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 114 proven. 1388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:42:04,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709460687] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:42:04,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:42:04,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 47, 46] total 115 [2022-07-19 09:42:04,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819584795] [2022-07-19 09:42:04,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:42:04,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-07-19 09:42:04,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:42:04,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-07-19 09:42:04,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1780, Invalid=11330, Unknown=0, NotChecked=0, Total=13110 [2022-07-19 09:42:04,049 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 115 states, 115 states have (on average 4.191304347826087) internal successors, (482), 115 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:43:36,172 INFO L93 Difference]: Finished difference Result 1024 states and 1154 transitions. [2022-07-19 09:43:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 698 states. [2022-07-19 09:43:36,176 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 4.191304347826087) internal successors, (482), 115 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-07-19 09:43:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:43:36,179 INFO L225 Difference]: With dead ends: 1024 [2022-07-19 09:43:36,179 INFO L226 Difference]: Without dead ends: 1022 [2022-07-19 09:43:36,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1207 GetRequests, 424 SyntacticMatches, 37 SemanticMatches, 746 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228725 ImplicationChecksByTransitivity, 93.4s TimeCoverageRelationStatistics Valid=40950, Invalid=517806, Unknown=0, NotChecked=0, Total=558756 [2022-07-19 09:43:36,205 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3898 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 2086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3898 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 10415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2086 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6025 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:43:36,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3898 Valid, 2645 Invalid, 10415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2086 Valid, 2304 Invalid, 0 Unknown, 6025 Unchecked, 3.1s Time] [2022-07-19 09:43:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-07-19 09:43:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 258. [2022-07-19 09:43:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0194552529182879) internal successors, (262), 257 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 262 transitions. [2022-07-19 09:43:36,263 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 262 transitions. Word has length 164 [2022-07-19 09:43:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:43:36,263 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 262 transitions. [2022-07-19 09:43:36,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 4.191304347826087) internal successors, (482), 115 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:43:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 262 transitions. [2022-07-19 09:43:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-19 09:43:36,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:43:36,264 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:43:36,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-19 09:43:36,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-19 09:43:36,487 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:43:36,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:43:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1626770528, now seen corresponding path program 37 times [2022-07-19 09:43:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:43:36,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620634365] [2022-07-19 09:43:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:43:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:43:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:43:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 61 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:37,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:43:37,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620634365] [2022-07-19 09:43:37,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620634365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:43:37,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024015913] [2022-07-19 09:43:37,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:43:37,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:43:37,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:43:37,398 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:43:37,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-19 09:43:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:43:37,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 171 conjunts are in the unsatisfiable core [2022-07-19 09:43:37,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:43:37,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:43:37,764 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:37,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:37,771 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:37,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:37,801 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:37,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:37,808 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:37,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:37,838 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:37,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:37,846 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:37,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:37,877 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:37,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:37,885 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:37,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:37,919 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:37,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:37,926 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:37,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:37,970 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:37,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:37,979 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:37,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,010 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,016 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,045 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,051 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,085 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,092 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,124 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,130 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,160 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,167 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,197 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,203 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,234 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,241 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,272 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,278 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,309 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,315 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,349 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,356 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,389 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,395 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,429 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,435 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,468 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:43:38,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-19 09:43:38,474 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 09:43:38,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:38,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:43:38,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:43:39,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:43:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 61 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:43:39,966 INFO L328 TraceCheckSpWp]: Computing backward predicates...