./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:32:39,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:32:39,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:32:39,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:32:39,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:32:39,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:32:39,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:32:39,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:32:39,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:32:39,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:32:39,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:32:39,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:32:39,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:32:39,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:32:39,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:32:39,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:32:39,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:32:39,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:32:39,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:32:39,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:32:39,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:32:39,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:32:39,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:32:39,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:32:39,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:32:39,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:32:39,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:32:39,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:32:39,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:32:39,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:32:39,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:32:39,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:32:39,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:32:39,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:32:39,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:32:39,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:32:39,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:32:39,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:32:39,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:32:39,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:32:39,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:32:39,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:32:39,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:32:39,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:32:39,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:32:39,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:32:39,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:32:39,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:32:39,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:32:39,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:32:39,437 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:32:39,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:32:39,437 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:32:39,438 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:32:39,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:32:39,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:32:39,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:32:39,438 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:32:39,438 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:32:39,438 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:32:39,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:32:39,439 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:32:39,439 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:32:39,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:32:39,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:32:39,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:32:39,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:32:39,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:32:39,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:32:39,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:32:39,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:32:39,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:32:39,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:32:39,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 [2021-12-14 19:32:39,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:32:39,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:32:39,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:32:39,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:32:39,807 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:32:39,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2021-12-14 19:32:39,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860d19f19/1dd18c6e67c444ec9c229819843105f8/FLAG0f030c41b [2021-12-14 19:32:40,212 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:32:40,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2021-12-14 19:32:40,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860d19f19/1dd18c6e67c444ec9c229819843105f8/FLAG0f030c41b [2021-12-14 19:32:40,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860d19f19/1dd18c6e67c444ec9c229819843105f8 [2021-12-14 19:32:40,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:32:40,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:32:40,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:32:40,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:32:40,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:32:40,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:32:40" (1/1) ... [2021-12-14 19:32:40,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4460a359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:40, skipping insertion in model container [2021-12-14 19:32:40,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:32:40" (1/1) ... [2021-12-14 19:32:40,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:32:40,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:32:41,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:32:41,110 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:32:41,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:32:41,210 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:32:41,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41 WrapperNode [2021-12-14 19:32:41,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:32:41,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:32:41,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:32:41,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:32:41,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,291 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2021-12-14 19:32:41,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:32:41,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:32:41,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:32:41,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:32:41,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:32:41,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:32:41,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:32:41,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:32:41,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (1/1) ... [2021-12-14 19:32:41,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:32:41,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:41,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 19:32:41,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 19:32:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:32:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:32:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 19:32:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:32:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:32:41,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:32:41,484 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:32:41,485 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:32:41,656 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:32:41,660 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:32:41,660 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 19:32:41,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:32:41 BoogieIcfgContainer [2021-12-14 19:32:41,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:32:41,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:32:41,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:32:41,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:32:41,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:32:40" (1/3) ... [2021-12-14 19:32:41,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1512d1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:32:41, skipping insertion in model container [2021-12-14 19:32:41,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:41" (2/3) ... [2021-12-14 19:32:41,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1512d1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:32:41, skipping insertion in model container [2021-12-14 19:32:41,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:32:41" (3/3) ... [2021-12-14 19:32:41,667 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2021-12-14 19:32:41,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:32:41,670 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-14 19:32:41,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:32:41,703 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 19:32:41,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-14 19:32:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:32:41,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:41,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:41,717 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031099, now seen corresponding path program 1 times [2021-12-14 19:32:41,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:41,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845702907] [2021-12-14 19:32:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:41,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:41,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:41,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845702907] [2021-12-14 19:32:41,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845702907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:41,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:41,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:32:41,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268797081] [2021-12-14 19:32:41,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:41,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:32:41,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:32:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:41,973 INFO L87 Difference]: Start difference. First operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,076 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2021-12-14 19:32:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:42,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 19:32:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,084 INFO L225 Difference]: With dead ends: 127 [2021-12-14 19:32:42,084 INFO L226 Difference]: Without dead ends: 121 [2021-12-14 19:32:42,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:32:42,088 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 217 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 164 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-14 19:32:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 46. [2021-12-14 19:32:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-14 19:32:42,112 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 7 [2021-12-14 19:32:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,112 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-14 19:32:42,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-14 19:32:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:32:42,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:32:42,114 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033021, now seen corresponding path program 1 times [2021-12-14 19:32:42,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475478055] [2021-12-14 19:32:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475478055] [2021-12-14 19:32:42,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475478055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:32:42,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982468784] [2021-12-14 19:32:42,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:32:42,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:32:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:32:42,136 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,154 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-12-14 19:32:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:32:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 19:32:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,156 INFO L225 Difference]: With dead ends: 47 [2021-12-14 19:32:42,156 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 19:32:42,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:32:42,157 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 19:32:42,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-12-14 19:32:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.75) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-14 19:32:42,161 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2021-12-14 19:32:42,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,161 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-14 19:32:42,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-14 19:32:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:32:42,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:32:42,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-12-14 19:32:42,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169620501] [2021-12-14 19:32:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169620501] [2021-12-14 19:32:42,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169620501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:42,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748147118] [2021-12-14 19:32:42,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:42,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:42,199 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-12-14 19:32:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,218 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-12-14 19:32:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-12-14 19:32:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,219 INFO L225 Difference]: With dead ends: 78 [2021-12-14 19:32:42,219 INFO L226 Difference]: Without dead ends: 78 [2021-12-14 19:32:42,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:42,220 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 37 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-14 19:32:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-12-14 19:32:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-14 19:32:42,224 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2021-12-14 19:32:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,224 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-14 19:32:42,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-12-14 19:32:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-14 19:32:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:32:42,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:32:42,225 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-12-14 19:32:42,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111352877] [2021-12-14 19:32:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111352877] [2021-12-14 19:32:42,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111352877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:32:42,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494614121] [2021-12-14 19:32:42,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:32:42,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:32:42,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:42,265 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-12-14 19:32:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,318 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2021-12-14 19:32:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2021-12-14 19:32:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,319 INFO L225 Difference]: With dead ends: 84 [2021-12-14 19:32:42,320 INFO L226 Difference]: Without dead ends: 84 [2021-12-14 19:32:42,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:32:42,321 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 163 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-14 19:32:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2021-12-14 19:32:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-14 19:32:42,340 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2021-12-14 19:32:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,341 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-14 19:32:42,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-12-14 19:32:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-14 19:32:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:32:42,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:32:42,358 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2021-12-14 19:32:42,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083057217] [2021-12-14 19:32:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083057217] [2021-12-14 19:32:42,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083057217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:32:42,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840204388] [2021-12-14 19:32:42,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:32:42,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:32:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:32:42,437 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2021-12-14 19:32:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,460 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-12-14 19:32:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:32:42,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 [2021-12-14 19:32:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,463 INFO L225 Difference]: With dead ends: 45 [2021-12-14 19:32:42,463 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 19:32:42,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:32:42,464 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 19:32:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-14 19:32:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.65625) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-12-14 19:32:42,467 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2021-12-14 19:32:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,468 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-12-14 19:32:42,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2021-12-14 19:32:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-12-14 19:32:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:32:42,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 19:32:42,469 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2021-12-14 19:32:42,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326572145] [2021-12-14 19:32:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326572145] [2021-12-14 19:32:42,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326572145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:32:42,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836515201] [2021-12-14 19:32:42,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:42,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:42,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:42,514 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-12-14 19:32:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,573 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-12-14 19:32:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:42,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2021-12-14 19:32:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,574 INFO L225 Difference]: With dead ends: 79 [2021-12-14 19:32:42,574 INFO L226 Difference]: Without dead ends: 79 [2021-12-14 19:32:42,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:42,575 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 82 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-14 19:32:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2021-12-14 19:32:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-14 19:32:42,579 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 8 [2021-12-14 19:32:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,579 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-14 19:32:42,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-12-14 19:32:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-14 19:32:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:32:42,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 19:32:42,580 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2021-12-14 19:32:42,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586238586] [2021-12-14 19:32:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586238586] [2021-12-14 19:32:42,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586238586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:32:42,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737158768] [2021-12-14 19:32:42,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:42,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:42,623 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,643 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-12-14 19:32:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 19:32:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,645 INFO L225 Difference]: With dead ends: 46 [2021-12-14 19:32:42,645 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 19:32:42,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:42,646 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 19:32:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-14 19:32:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-14 19:32:42,649 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2021-12-14 19:32:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,650 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-14 19:32:42,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-14 19:32:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:32:42,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 19:32:42,651 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,652 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2021-12-14 19:32:42,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949442696] [2021-12-14 19:32:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949442696] [2021-12-14 19:32:42,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949442696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:42,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582144243] [2021-12-14 19:32:42,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:42,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:42,689 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,700 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2021-12-14 19:32:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:42,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 19:32:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,701 INFO L225 Difference]: With dead ends: 80 [2021-12-14 19:32:42,701 INFO L226 Difference]: Without dead ends: 80 [2021-12-14 19:32:42,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:42,702 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-14 19:32:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2021-12-14 19:32:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-12-14 19:32:42,705 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 10 [2021-12-14 19:32:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,705 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-12-14 19:32:42,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-12-14 19:32:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:32:42,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 19:32:42,706 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,707 INFO L85 PathProgramCache]: Analyzing trace with hash 747838365, now seen corresponding path program 1 times [2021-12-14 19:32:42,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479697029] [2021-12-14 19:32:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479697029] [2021-12-14 19:32:42,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479697029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:32:42,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872657500] [2021-12-14 19:32:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:32:42,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:32:42,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:32:42,724 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,739 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-12-14 19:32:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:32:42,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 19:32:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,740 INFO L225 Difference]: With dead ends: 55 [2021-12-14 19:32:42,741 INFO L226 Difference]: Without dead ends: 55 [2021-12-14 19:32:42,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:32:42,741 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-14 19:32:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-14 19:32:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.488888888888889) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-12-14 19:32:42,744 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 10 [2021-12-14 19:32:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,744 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-12-14 19:32:42,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-12-14 19:32:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:32:42,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 19:32:42,746 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,746 INFO L85 PathProgramCache]: Analyzing trace with hash 747838366, now seen corresponding path program 1 times [2021-12-14 19:32:42,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770285166] [2021-12-14 19:32:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770285166] [2021-12-14 19:32:42,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770285166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:32:42,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17613046] [2021-12-14 19:32:42,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:32:42,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:32:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:32:42,836 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,930 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2021-12-14 19:32:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:32:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 19:32:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,931 INFO L225 Difference]: With dead ends: 107 [2021-12-14 19:32:42,931 INFO L226 Difference]: Without dead ends: 107 [2021-12-14 19:32:42,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:32:42,947 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-14 19:32:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 56. [2021-12-14 19:32:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.5) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-12-14 19:32:42,955 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 10 [2021-12-14 19:32:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,956 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-12-14 19:32:42,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-12-14 19:32:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:32:42,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 19:32:42,957 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:42,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1772121568, now seen corresponding path program 1 times [2021-12-14 19:32:42,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178007338] [2021-12-14 19:32:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:43,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178007338] [2021-12-14 19:32:43,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178007338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:43,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:43,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:32:43,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926091185] [2021-12-14 19:32:43,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:43,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:32:43,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:32:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:32:43,042 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:43,149 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-12-14 19:32:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:32:43,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 19:32:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:43,150 INFO L225 Difference]: With dead ends: 81 [2021-12-14 19:32:43,150 INFO L226 Difference]: Without dead ends: 81 [2021-12-14 19:32:43,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:32:43,151 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:43,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 67 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-14 19:32:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2021-12-14 19:32:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.5) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2021-12-14 19:32:43,154 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 10 [2021-12-14 19:32:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:43,154 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2021-12-14 19:32:43,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2021-12-14 19:32:43,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:32:43,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:43,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:43,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 19:32:43,155 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash -66856135, now seen corresponding path program 1 times [2021-12-14 19:32:43,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840197307] [2021-12-14 19:32:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:43,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:43,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:43,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840197307] [2021-12-14 19:32:43,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840197307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:43,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:43,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:43,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51541913] [2021-12-14 19:32:43,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:43,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:32:43,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:43,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:32:43,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:43,196 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:43,240 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-12-14 19:32:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 19:32:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:43,241 INFO L225 Difference]: With dead ends: 83 [2021-12-14 19:32:43,242 INFO L226 Difference]: Without dead ends: 83 [2021-12-14 19:32:43,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:32:43,242 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 123 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:43,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-14 19:32:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-12-14 19:32:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2021-12-14 19:32:43,245 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 11 [2021-12-14 19:32:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:43,246 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2021-12-14 19:32:43,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2021-12-14 19:32:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:32:43,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:43,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:43,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 19:32:43,247 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1708151227, now seen corresponding path program 1 times [2021-12-14 19:32:43,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:43,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618660833] [2021-12-14 19:32:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:43,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:43,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:43,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618660833] [2021-12-14 19:32:43,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618660833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:43,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:43,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:43,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253007441] [2021-12-14 19:32:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:43,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:32:43,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:32:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:43,299 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:43,358 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-12-14 19:32:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 19:32:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:43,359 INFO L225 Difference]: With dead ends: 63 [2021-12-14 19:32:43,359 INFO L226 Difference]: Without dead ends: 63 [2021-12-14 19:32:43,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:32:43,361 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:43,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-14 19:32:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-12-14 19:32:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-12-14 19:32:43,370 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 11 [2021-12-14 19:32:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:43,370 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-12-14 19:32:43,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-12-14 19:32:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 19:32:43,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:43,387 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:43,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 19:32:43,388 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:43,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2021-12-14 19:32:43,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:43,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759361570] [2021-12-14 19:32:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:43,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:43,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:43,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759361570] [2021-12-14 19:32:43,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759361570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:43,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495580209] [2021-12-14 19:32:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:43,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:43,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:43,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:43,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:32:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:43,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:32:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:43,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:43,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:32:43,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:32:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:43,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:44,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495580209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:44,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:44,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-14 19:32:44,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915491332] [2021-12-14 19:32:44,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:44,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:32:44,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:32:44,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:32:44,003 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:44,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:44,267 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2021-12-14 19:32:44,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:32:44,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-14 19:32:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:44,269 INFO L225 Difference]: With dead ends: 122 [2021-12-14 19:32:44,269 INFO L226 Difference]: Without dead ends: 122 [2021-12-14 19:32:44,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:32:44,270 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 266 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:44,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 184 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:32:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-14 19:32:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 52. [2021-12-14 19:32:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-12-14 19:32:44,273 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 12 [2021-12-14 19:32:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:44,273 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-12-14 19:32:44,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-12-14 19:32:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 19:32:44,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:44,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:44,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:44,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 19:32:44,491 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:44,492 INFO L85 PathProgramCache]: Analyzing trace with hash 175763932, now seen corresponding path program 1 times [2021-12-14 19:32:44,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:44,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880239010] [2021-12-14 19:32:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:44,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:44,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:44,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880239010] [2021-12-14 19:32:44,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880239010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:44,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:44,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:32:44,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206081338] [2021-12-14 19:32:44,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:44,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:44,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:44,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:44,551 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:44,601 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-12-14 19:32:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:44,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-14 19:32:44,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:44,604 INFO L225 Difference]: With dead ends: 51 [2021-12-14 19:32:44,604 INFO L226 Difference]: Without dead ends: 51 [2021-12-14 19:32:44,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:44,606 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:44,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-14 19:32:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-14 19:32:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-12-14 19:32:44,610 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 13 [2021-12-14 19:32:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:44,611 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-12-14 19:32:44,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-12-14 19:32:44,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 19:32:44,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:44,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:44,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 19:32:44,613 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash 175763933, now seen corresponding path program 1 times [2021-12-14 19:32:44,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:44,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210588604] [2021-12-14 19:32:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:44,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:44,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:44,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210588604] [2021-12-14 19:32:44,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210588604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:44,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:44,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:32:44,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650852439] [2021-12-14 19:32:44,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:44,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:32:44,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:44,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:32:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:32:44,734 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:44,853 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-12-14 19:32:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-14 19:32:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:44,854 INFO L225 Difference]: With dead ends: 55 [2021-12-14 19:32:44,854 INFO L226 Difference]: Without dead ends: 55 [2021-12-14 19:32:44,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:32:44,854 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:44,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 65 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-14 19:32:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-12-14 19:32:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-12-14 19:32:44,856 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 13 [2021-12-14 19:32:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:44,856 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-12-14 19:32:44,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-12-14 19:32:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:32:44,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:44,857 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:44,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 19:32:44,857 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1510420451, now seen corresponding path program 1 times [2021-12-14 19:32:44,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:44,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145135814] [2021-12-14 19:32:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:44,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:44,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:44,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145135814] [2021-12-14 19:32:44,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145135814] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:44,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994346934] [2021-12-14 19:32:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:44,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:44,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:44,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:32:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:32:45,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:45,100 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:32:45,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:32:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:45,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:45,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994346934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:45,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:45,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-14 19:32:45,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605517463] [2021-12-14 19:32:45,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:45,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:32:45,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:32:45,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:32:45,316 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:45,482 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-12-14 19:32:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:32:45,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-14 19:32:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:45,483 INFO L225 Difference]: With dead ends: 95 [2021-12-14 19:32:45,483 INFO L226 Difference]: Without dead ends: 95 [2021-12-14 19:32:45,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-12-14 19:32:45,484 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 156 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:45,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 164 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-14 19:32:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2021-12-14 19:32:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.372093023255814) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-12-14 19:32:45,485 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2021-12-14 19:32:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:45,485 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-12-14 19:32:45,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-12-14 19:32:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:32:45,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:45,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:45,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 19:32:45,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 19:32:45,691 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 618210419, now seen corresponding path program 1 times [2021-12-14 19:32:45,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:45,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943082430] [2021-12-14 19:32:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:45,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:45,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:45,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943082430] [2021-12-14 19:32:45,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943082430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:45,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:45,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:45,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236674987] [2021-12-14 19:32:45,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:45,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:32:45,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:32:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:45,716 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-14 19:32:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:45,744 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-12-14 19:32:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:45,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 [2021-12-14 19:32:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:45,745 INFO L225 Difference]: With dead ends: 48 [2021-12-14 19:32:45,745 INFO L226 Difference]: Without dead ends: 48 [2021-12-14 19:32:45,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:32:45,746 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:45,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-14 19:32:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-14 19:32:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-12-14 19:32:45,748 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 16 [2021-12-14 19:32:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:45,748 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-12-14 19:32:45,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-14 19:32:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-12-14 19:32:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:32:45,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:45,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:45,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 19:32:45,749 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash 618210420, now seen corresponding path program 1 times [2021-12-14 19:32:45,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:45,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458579632] [2021-12-14 19:32:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:45,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:45,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:45,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458579632] [2021-12-14 19:32:45,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458579632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:45,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:45,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:32:45,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312350693] [2021-12-14 19:32:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:45,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:32:45,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:32:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:32:45,801 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-12-14 19:32:45,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:45,879 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-12-14 19:32:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:32:45,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-12-14 19:32:45,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:45,880 INFO L225 Difference]: With dead ends: 54 [2021-12-14 19:32:45,880 INFO L226 Difference]: Without dead ends: 54 [2021-12-14 19:32:45,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:32:45,881 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:45,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-14 19:32:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-12-14 19:32:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-14 19:32:45,882 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 16 [2021-12-14 19:32:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:45,883 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-14 19:32:45,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-12-14 19:32:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-14 19:32:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:32:45,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:45,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:45,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 19:32:45,884 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash 618212108, now seen corresponding path program 1 times [2021-12-14 19:32:45,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:45,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955512440] [2021-12-14 19:32:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:45,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:45,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:45,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955512440] [2021-12-14 19:32:45,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955512440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:45,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376780944] [2021-12-14 19:32:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:45,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:45,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:45,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:46,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:32:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:46,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 19:32:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:32:46,172 INFO L388 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 [2021-12-14 19:32:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:46,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:32:46,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376780944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:46,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:32:46,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-14 19:32:46,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202137803] [2021-12-14 19:32:46,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:46,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:32:46,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:46,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:32:46,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:32:46,200 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-12-14 19:32:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:46,276 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-12-14 19:32:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:32:46,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 [2021-12-14 19:32:46,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:46,277 INFO L225 Difference]: With dead ends: 75 [2021-12-14 19:32:46,277 INFO L226 Difference]: Without dead ends: 75 [2021-12-14 19:32:46,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:32:46,278 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:46,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 178 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:46,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-14 19:32:46,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-12-14 19:32:46,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-14 19:32:46,283 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 16 [2021-12-14 19:32:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:46,284 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-14 19:32:46,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-12-14 19:32:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-14 19:32:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:32:46,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:46,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:46,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:46,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:46,500 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:46,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:46,501 INFO L85 PathProgramCache]: Analyzing trace with hash 876377546, now seen corresponding path program 1 times [2021-12-14 19:32:46,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:46,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308287172] [2021-12-14 19:32:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:46,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:46,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:46,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308287172] [2021-12-14 19:32:46,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308287172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:46,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928883460] [2021-12-14 19:32:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:46,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:46,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:46,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:46,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:32:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:46,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 19:32:46,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:46,667 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:32:46,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:32:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:46,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:46,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928883460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:46,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:46,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2021-12-14 19:32:46,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966868919] [2021-12-14 19:32:46,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:46,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:32:46,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:32:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:32:46,949 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:47,060 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-14 19:32:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:32:47,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 19:32:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:47,061 INFO L225 Difference]: With dead ends: 76 [2021-12-14 19:32:47,061 INFO L226 Difference]: Without dead ends: 76 [2021-12-14 19:32:47,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:32:47,062 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:47,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 121 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-14 19:32:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2021-12-14 19:32:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.280701754385965) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-14 19:32:47,063 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 16 [2021-12-14 19:32:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:47,064 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-14 19:32:47,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-14 19:32:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:32:47,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:47,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:47,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:47,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:47,279 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653866, now seen corresponding path program 1 times [2021-12-14 19:32:47,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:47,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160253542] [2021-12-14 19:32:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:47,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:47,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:47,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160253542] [2021-12-14 19:32:47,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160253542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:47,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:47,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:47,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703321336] [2021-12-14 19:32:47,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:47,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:32:47,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:47,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:32:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:47,326 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:47,359 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-12-14 19:32:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:47,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-14 19:32:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:47,361 INFO L225 Difference]: With dead ends: 61 [2021-12-14 19:32:47,361 INFO L226 Difference]: Without dead ends: 61 [2021-12-14 19:32:47,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:32:47,362 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:47,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 64 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-14 19:32:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-14 19:32:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.263157894736842) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-12-14 19:32:47,382 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 17 [2021-12-14 19:32:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:47,382 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-12-14 19:32:47,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-12-14 19:32:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:32:47,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:47,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:47,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 19:32:47,384 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:47,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653867, now seen corresponding path program 1 times [2021-12-14 19:32:47,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:47,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372609572] [2021-12-14 19:32:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:47,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:47,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:47,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372609572] [2021-12-14 19:32:47,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372609572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:47,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:47,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:32:47,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380705480] [2021-12-14 19:32:47,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:47,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:32:47,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:47,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:32:47,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:32:47,461 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:47,532 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-14 19:32:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:32:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-14 19:32:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:47,533 INFO L225 Difference]: With dead ends: 65 [2021-12-14 19:32:47,533 INFO L226 Difference]: Without dead ends: 65 [2021-12-14 19:32:47,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:32:47,535 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:47,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 80 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-14 19:32:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-14 19:32:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.25) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-12-14 19:32:47,540 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 17 [2021-12-14 19:32:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:47,542 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-12-14 19:32:47,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-12-14 19:32:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:32:47,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:47,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:47,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 19:32:47,543 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:47,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash -942701569, now seen corresponding path program 2 times [2021-12-14 19:32:47,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552458612] [2021-12-14 19:32:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:47,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:32:47,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:47,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552458612] [2021-12-14 19:32:47,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552458612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:47,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:47,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:32:47,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036022259] [2021-12-14 19:32:47,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:47,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:32:47,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:32:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:32:47,667 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-12-14 19:32:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:47,812 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-12-14 19:32:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:32:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) Word has length 19 [2021-12-14 19:32:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:47,813 INFO L225 Difference]: With dead ends: 91 [2021-12-14 19:32:47,813 INFO L226 Difference]: Without dead ends: 91 [2021-12-14 19:32:47,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:32:47,813 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 89 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:47,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 184 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-14 19:32:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-12-14 19:32:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-12-14 19:32:47,815 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 19 [2021-12-14 19:32:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:47,815 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-12-14 19:32:47,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-12-14 19:32:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-12-14 19:32:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:32:47,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:47,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:47,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 19:32:47,816 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1963769923, now seen corresponding path program 1 times [2021-12-14 19:32:47,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:47,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107178454] [2021-12-14 19:32:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:47,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:32:47,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:47,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107178454] [2021-12-14 19:32:47,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107178454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:47,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:47,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:32:47,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118821289] [2021-12-14 19:32:47,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:47,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:32:47,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:47,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:32:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:32:47,921 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-12-14 19:32:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:48,040 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-12-14 19:32:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:32:48,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) Word has length 19 [2021-12-14 19:32:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:48,041 INFO L225 Difference]: With dead ends: 82 [2021-12-14 19:32:48,041 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 19:32:48,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:32:48,042 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 133 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:48,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 149 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 19:32:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2021-12-14 19:32:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.280701754385965) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-14 19:32:48,043 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2021-12-14 19:32:48,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:48,043 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-14 19:32:48,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-12-14 19:32:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-14 19:32:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:32:48,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:48,044 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:48,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 19:32:48,044 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:48,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash 303592444, now seen corresponding path program 1 times [2021-12-14 19:32:48,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:48,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623017793] [2021-12-14 19:32:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:48,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:48,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623017793] [2021-12-14 19:32:48,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623017793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:48,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:48,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:32:48,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78389261] [2021-12-14 19:32:48,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:48,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:32:48,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:32:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:32:48,164 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:48,282 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2021-12-14 19:32:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:32:48,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 19:32:48,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:48,283 INFO L225 Difference]: With dead ends: 100 [2021-12-14 19:32:48,283 INFO L226 Difference]: Without dead ends: 100 [2021-12-14 19:32:48,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:32:48,284 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:48,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 190 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-14 19:32:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-12-14 19:32:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 93 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-12-14 19:32:48,286 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 20 [2021-12-14 19:32:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:48,286 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-12-14 19:32:48,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-12-14 19:32:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:32:48,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:48,287 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:48,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 19:32:48,287 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1690552262, now seen corresponding path program 1 times [2021-12-14 19:32:48,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:48,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874291265] [2021-12-14 19:32:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:48,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:48,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:48,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874291265] [2021-12-14 19:32:48,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874291265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:48,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:48,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 19:32:48,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715689435] [2021-12-14 19:32:48,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:48,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:32:48,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:32:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:32:48,450 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:48,706 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2021-12-14 19:32:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:32:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 19:32:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:48,707 INFO L225 Difference]: With dead ends: 122 [2021-12-14 19:32:48,707 INFO L226 Difference]: Without dead ends: 122 [2021-12-14 19:32:48,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:32:48,707 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:48,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 201 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-14 19:32:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 91. [2021-12-14 19:32:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 90 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-12-14 19:32:48,709 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 20 [2021-12-14 19:32:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:48,709 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-12-14 19:32:48,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-12-14 19:32:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:32:48,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:48,710 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:48,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 19:32:48,710 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:48,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:48,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1016067132, now seen corresponding path program 1 times [2021-12-14 19:32:48,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:48,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142331713] [2021-12-14 19:32:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:48,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:48,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:48,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142331713] [2021-12-14 19:32:48,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142331713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:48,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:48,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:32:48,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143544726] [2021-12-14 19:32:48,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:48,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:32:48,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:48,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:32:48,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:32:48,959 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:49,167 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2021-12-14 19:32:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:32:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 19:32:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:49,168 INFO L225 Difference]: With dead ends: 146 [2021-12-14 19:32:49,168 INFO L226 Difference]: Without dead ends: 146 [2021-12-14 19:32:49,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:32:49,168 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 89 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:49,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 195 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-14 19:32:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2021-12-14 19:32:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.27) internal successors, (127), 103 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2021-12-14 19:32:49,171 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 20 [2021-12-14 19:32:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:49,171 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2021-12-14 19:32:49,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2021-12-14 19:32:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:32:49,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:49,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:49,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 19:32:49,171 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash 821386545, now seen corresponding path program 1 times [2021-12-14 19:32:49,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:49,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626430931] [2021-12-14 19:32:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:49,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:49,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626430931] [2021-12-14 19:32:49,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626430931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:49,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:49,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:32:49,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040720277] [2021-12-14 19:32:49,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:49,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:49,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:49,219 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:49,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:49,231 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2021-12-14 19:32:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:49,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) Word has length 21 [2021-12-14 19:32:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:49,232 INFO L225 Difference]: With dead ends: 103 [2021-12-14 19:32:49,232 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 19:32:49,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:49,232 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:49,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 19:32:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-14 19:32:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-12-14 19:32:49,235 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 21 [2021-12-14 19:32:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:49,235 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-12-14 19:32:49,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-12-14 19:32:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:32:49,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:49,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:49,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-14 19:32:49,236 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash 293432666, now seen corresponding path program 1 times [2021-12-14 19:32:49,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:49,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182648131] [2021-12-14 19:32:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:49,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:49,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182648131] [2021-12-14 19:32:49,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182648131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440039607] [2021-12-14 19:32:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:49,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:49,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:49,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:49,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:32:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 19:32:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:49,395 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:32:49,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:32:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:49,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:49,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440039607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:49,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:49,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-14 19:32:49,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946242999] [2021-12-14 19:32:49,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:49,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 19:32:49,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 19:32:49,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-12-14 19:32:49,755 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:50,116 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2021-12-14 19:32:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:32:50,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-14 19:32:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:50,117 INFO L225 Difference]: With dead ends: 129 [2021-12-14 19:32:50,117 INFO L226 Difference]: Without dead ends: 129 [2021-12-14 19:32:50,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:32:50,118 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 341 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:50,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 152 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:32:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-14 19:32:50,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 92. [2021-12-14 19:32:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2021-12-14 19:32:50,120 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 23 [2021-12-14 19:32:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:50,120 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2021-12-14 19:32:50,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2021-12-14 19:32:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:32:50,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:50,120 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:50,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:50,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:50,331 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:50,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:50,332 INFO L85 PathProgramCache]: Analyzing trace with hash 506425757, now seen corresponding path program 1 times [2021-12-14 19:32:50,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:50,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830272205] [2021-12-14 19:32:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:50,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:50,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:50,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830272205] [2021-12-14 19:32:50,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830272205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:50,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643052562] [2021-12-14 19:32:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:50,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:50,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:50,439 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:50,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:32:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 19:32:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:50,528 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:32:50,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:32:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:50,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:50,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643052562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:50,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:50,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-14 19:32:50,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208151836] [2021-12-14 19:32:50,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:50,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 19:32:50,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:50,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 19:32:50,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:32:50,938 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:51,335 INFO L93 Difference]: Finished difference Result 130 states and 143 transitions. [2021-12-14 19:32:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:32:51,335 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-14 19:32:51,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:51,336 INFO L225 Difference]: With dead ends: 130 [2021-12-14 19:32:51,336 INFO L226 Difference]: Without dead ends: 124 [2021-12-14 19:32:51,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 19:32:51,337 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 303 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:51,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 160 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-14 19:32:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2021-12-14 19:32:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.1875) internal successors, (114), 98 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2021-12-14 19:32:51,340 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 24 [2021-12-14 19:32:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:51,340 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2021-12-14 19:32:51,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2021-12-14 19:32:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:32:51,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:51,341 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:51,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:51,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:51,560 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:51,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1809160449, now seen corresponding path program 1 times [2021-12-14 19:32:51,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:51,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573511087] [2021-12-14 19:32:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:51,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:51,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573511087] [2021-12-14 19:32:51,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573511087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125589784] [2021-12-14 19:32:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:51,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:51,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:51,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:51,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:32:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:51,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-14 19:32:51,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:51,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:32:51,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:32:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:51,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125589784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:52,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:52,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-12-14 19:32:52,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125988829] [2021-12-14 19:32:52,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:52,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 19:32:52,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:52,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 19:32:52,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-14 19:32:52,056 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:52,356 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2021-12-14 19:32:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:32:52,356 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 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 24 [2021-12-14 19:32:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:52,357 INFO L225 Difference]: With dead ends: 141 [2021-12-14 19:32:52,357 INFO L226 Difference]: Without dead ends: 141 [2021-12-14 19:32:52,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-12-14 19:32:52,358 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 239 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:52,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 210 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-14 19:32:52,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2021-12-14 19:32:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 114 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2021-12-14 19:32:52,360 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 24 [2021-12-14 19:32:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:52,361 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2021-12-14 19:32:52,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:52,361 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2021-12-14 19:32:52,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 19:32:52,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:52,361 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:52,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:52,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:52,562 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:52,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1394123375, now seen corresponding path program 2 times [2021-12-14 19:32:52,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:52,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140822136] [2021-12-14 19:32:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:52,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:32:52,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:52,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140822136] [2021-12-14 19:32:52,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140822136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:52,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088442826] [2021-12-14 19:32:52,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:32:52,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:52,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:52,751 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:52,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:32:52,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:32:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 19:32:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:52,887 INFO L388 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 14 treesize of output 10 [2021-12-14 19:32:52,987 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-14 19:32:52,988 INFO L388 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 18 treesize of output 10 [2021-12-14 19:32:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:32:53,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:53,065 INFO L388 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 13 [2021-12-14 19:32:53,069 INFO L388 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 26 treesize of output 22 [2021-12-14 19:32:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:32:53,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088442826] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:53,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:53,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2021-12-14 19:32:53,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518860107] [2021-12-14 19:32:53,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:53,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 19:32:53,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:53,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 19:32:53,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:32:53,172 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:53,402 INFO L93 Difference]: Finished difference Result 199 states and 220 transitions. [2021-12-14 19:32:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:32:53,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-14 19:32:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:53,403 INFO L225 Difference]: With dead ends: 199 [2021-12-14 19:32:53,403 INFO L226 Difference]: Without dead ends: 191 [2021-12-14 19:32:53,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:32:53,404 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 146 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:53,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 267 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 126 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-14 19:32:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-14 19:32:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2021-12-14 19:32:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2021-12-14 19:32:53,406 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 26 [2021-12-14 19:32:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:53,406 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2021-12-14 19:32:53,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2021-12-14 19:32:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 19:32:53,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:53,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:53,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:53,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-14 19:32:53,619 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1149798068, now seen corresponding path program 1 times [2021-12-14 19:32:53,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:53,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586306948] [2021-12-14 19:32:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:53,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 19:32:53,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:53,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586306948] [2021-12-14 19:32:53,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586306948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:53,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:53,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:32:53,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433630819] [2021-12-14 19:32:53,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:53,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:32:53,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:32:53,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:32:53,770 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:53,912 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2021-12-14 19:32:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:32:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-14 19:32:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:53,913 INFO L225 Difference]: With dead ends: 156 [2021-12-14 19:32:53,913 INFO L226 Difference]: Without dead ends: 140 [2021-12-14 19:32:53,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:32:53,913 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:53,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 155 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-14 19:32:53,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2021-12-14 19:32:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 109 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-12-14 19:32:53,915 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 27 [2021-12-14 19:32:53,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:53,915 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-12-14 19:32:53,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:53,916 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-12-14 19:32:53,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 19:32:53,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:53,916 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:53,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-14 19:32:53,916 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash 446658823, now seen corresponding path program 2 times [2021-12-14 19:32:53,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:53,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307778290] [2021-12-14 19:32:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:53,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:54,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:54,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307778290] [2021-12-14 19:32:54,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307778290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:54,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430970334] [2021-12-14 19:32:54,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:32:54,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:54,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:54,255 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:54,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 19:32:54,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:32:54,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-14 19:32:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:54,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:32:54,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:32:54,480 INFO L388 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 14 treesize of output 16 [2021-12-14 19:32:54,529 INFO L388 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 14 treesize of output 16 [2021-12-14 19:32:54,565 INFO L388 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 [2021-12-14 19:32:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:54,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:54,587 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_400) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-14 19:32:54,594 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_400) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-14 19:32:54,603 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_400) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))) is different from false [2021-12-14 19:32:54,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:54,611 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-14 19:32:54,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:54,616 INFO L388 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 37 treesize of output 37 [2021-12-14 19:32:54,618 INFO L388 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 11 treesize of output 7 [2021-12-14 19:32:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-14 19:32:54,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430970334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:54,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:54,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2021-12-14 19:32:54,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521831889] [2021-12-14 19:32:54,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:54,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 19:32:54,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:54,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 19:32:54,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=435, Unknown=3, NotChecked=132, Total=650 [2021-12-14 19:32:54,747 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:54,995 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2021-12-14 19:32:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:32:54,996 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-14 19:32:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:54,996 INFO L225 Difference]: With dead ends: 187 [2021-12-14 19:32:54,996 INFO L226 Difference]: Without dead ends: 157 [2021-12-14 19:32:54,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=651, Unknown=3, NotChecked=162, Total=930 [2021-12-14 19:32:54,997 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:54,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 387 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 338 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2021-12-14 19:32:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-14 19:32:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2021-12-14 19:32:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 147 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2021-12-14 19:32:54,999 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 28 [2021-12-14 19:32:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:54,999 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2021-12-14 19:32:54,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2021-12-14 19:32:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 19:32:55,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:55,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:55,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:55,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-14 19:32:55,200 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:55,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:55,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2025170382, now seen corresponding path program 3 times [2021-12-14 19:32:55,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:55,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416815509] [2021-12-14 19:32:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:55,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:55,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:55,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416815509] [2021-12-14 19:32:55,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416815509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:55,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376464102] [2021-12-14 19:32:55,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:32:55,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:55,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:55,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:55,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 19:32:55,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-14 19:32:55,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:55,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 19:32:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:55,374 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:32:55,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:32:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:55,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:55,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376464102] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:55,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:55,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2021-12-14 19:32:55,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732683460] [2021-12-14 19:32:55,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:55,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 19:32:55,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 19:32:55,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-12-14 19:32:55,856 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:56,334 INFO L93 Difference]: Finished difference Result 216 states and 239 transitions. [2021-12-14 19:32:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:32:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-14 19:32:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:56,335 INFO L225 Difference]: With dead ends: 216 [2021-12-14 19:32:56,335 INFO L226 Difference]: Without dead ends: 216 [2021-12-14 19:32:56,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2021-12-14 19:32:56,336 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 367 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:56,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 247 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:32:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-14 19:32:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 157. [2021-12-14 19:32:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 154 states have (on average 1.155844155844156) internal successors, (178), 156 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 178 transitions. [2021-12-14 19:32:56,338 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 178 transitions. Word has length 30 [2021-12-14 19:32:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:56,338 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 178 transitions. [2021-12-14 19:32:56,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 178 transitions. [2021-12-14 19:32:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-14 19:32:56,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:56,339 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:56,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:56,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-14 19:32:56,539 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:56,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1580697398, now seen corresponding path program 3 times [2021-12-14 19:32:56,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:56,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160830261] [2021-12-14 19:32:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:56,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:56,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:56,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160830261] [2021-12-14 19:32:56,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160830261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:56,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088046033] [2021-12-14 19:32:56,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:32:56,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:56,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:56,686 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:56,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 19:32:56,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 19:32:56,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 19:32:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:56,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:56,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:32:56,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:32:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:57,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:57,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088046033] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:57,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:57,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2021-12-14 19:32:57,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478773777] [2021-12-14 19:32:57,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:57,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 19:32:57,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 19:32:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-12-14 19:32:57,287 INFO L87 Difference]: Start difference. First operand 157 states and 178 transitions. Second operand has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 27 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:57,620 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2021-12-14 19:32:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:32:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 27 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-14 19:32:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:57,621 INFO L225 Difference]: With dead ends: 169 [2021-12-14 19:32:57,621 INFO L226 Difference]: Without dead ends: 169 [2021-12-14 19:32:57,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 19:32:57,622 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 227 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:57,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 364 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:57,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-14 19:32:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2021-12-14 19:32:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.150943396226415) internal successors, (183), 161 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) [2021-12-14 19:32:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2021-12-14 19:32:57,624 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 32 [2021-12-14 19:32:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:57,625 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2021-12-14 19:32:57,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 27 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2021-12-14 19:32:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 19:32:57,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:57,625 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:57,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:57,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-14 19:32:57,825 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:57,826 INFO L85 PathProgramCache]: Analyzing trace with hash -445225321, now seen corresponding path program 4 times [2021-12-14 19:32:57,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:57,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9386804] [2021-12-14 19:32:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:57,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:32:57,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:57,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9386804] [2021-12-14 19:32:57,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9386804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:57,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611830950] [2021-12-14 19:32:57,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:32:57,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:57,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:57,951 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:57,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 19:32:58,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:32:58,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:58,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 19:32:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:58,131 INFO L388 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 14 treesize of output 10 [2021-12-14 19:32:58,370 INFO L354 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-12-14 19:32:58,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2021-12-14 19:32:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:32:58,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:58,522 INFO L388 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 44 treesize of output 38 [2021-12-14 19:32:58,529 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-14 19:32:58,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 70 treesize of output 60 [2021-12-14 19:32:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:32:58,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611830950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:58,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:58,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 35 [2021-12-14 19:32:58,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118998502] [2021-12-14 19:32:58,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:58,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 19:32:58,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 19:32:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 19:32:58,676 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:59,406 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2021-12-14 19:32:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 19:32:59,406 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-14 19:32:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:59,408 INFO L225 Difference]: With dead ends: 218 [2021-12-14 19:32:59,408 INFO L226 Difference]: Without dead ends: 207 [2021-12-14 19:32:59,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=610, Invalid=2930, Unknown=0, NotChecked=0, Total=3540 [2021-12-14 19:32:59,409 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:59,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 344 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 310 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2021-12-14 19:32:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-14 19:32:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2021-12-14 19:32:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 193 states have (on average 1.145077720207254) internal successors, (221), 195 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 221 transitions. [2021-12-14 19:32:59,412 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 221 transitions. Word has length 33 [2021-12-14 19:32:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:59,412 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 221 transitions. [2021-12-14 19:32:59,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 221 transitions. [2021-12-14 19:32:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 19:32:59,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:59,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:59,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-14 19:32:59,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-14 19:32:59,623 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1756979051, now seen corresponding path program 1 times [2021-12-14 19:32:59,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:59,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569788354] [2021-12-14 19:32:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:59,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:59,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:59,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569788354] [2021-12-14 19:32:59,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569788354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:59,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646875238] [2021-12-14 19:32:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:59,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:59,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:59,744 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:59,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 19:32:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 19:32:59,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:59,841 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:32:59,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:33:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:00,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:00,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646875238] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:00,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:00,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2021-12-14 19:33:00,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356206439] [2021-12-14 19:33:00,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:00,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 19:33:00,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 19:33:00,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-12-14 19:33:00,318 INFO L87 Difference]: Start difference. First operand 196 states and 221 transitions. Second operand has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:00,953 INFO L93 Difference]: Finished difference Result 227 states and 249 transitions. [2021-12-14 19:33:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 19:33:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-14 19:33:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:00,954 INFO L225 Difference]: With dead ends: 227 [2021-12-14 19:33:00,954 INFO L226 Difference]: Without dead ends: 227 [2021-12-14 19:33:00,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=1588, Unknown=0, NotChecked=0, Total=1980 [2021-12-14 19:33:00,955 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 377 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:00,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 290 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:33:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-14 19:33:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2021-12-14 19:33:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.138755980861244) internal successors, (238), 211 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) [2021-12-14 19:33:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2021-12-14 19:33:00,958 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 33 [2021-12-14 19:33:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:00,958 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2021-12-14 19:33:00,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2021-12-14 19:33:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 19:33:00,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:00,959 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:00,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:01,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-14 19:33:01,168 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 603565394, now seen corresponding path program 4 times [2021-12-14 19:33:01,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516813997] [2021-12-14 19:33:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:01,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:01,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:01,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516813997] [2021-12-14 19:33:01,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516813997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:01,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139799947] [2021-12-14 19:33:01,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:33:01,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:01,532 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:01,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 19:33:01,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:33:01,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-14 19:33:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:01,648 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:33:01,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:33:01,938 INFO L388 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 14 treesize of output 10 [2021-12-14 19:33:02,003 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-12-14 19:33:02,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 19:33:02,326 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-14 19:33:02,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 40 [2021-12-14 19:33:02,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:02,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 46 [2021-12-14 19:33:02,577 INFO L388 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 24 treesize of output 24 [2021-12-14 19:33:02,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:33:02,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:33:02,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:33:02,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2021-12-14 19:33:02,691 INFO L388 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 11 treesize of output 7 [2021-12-14 19:33:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:02,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:03,338 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-12-14 19:33:03,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 71 [2021-12-14 19:33:03,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:33:03,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:33:03,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:03,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-12-14 19:33:03,353 INFO L388 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 9 treesize of output 7 [2021-12-14 19:33:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:03,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139799947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:03,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:03,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 49 [2021-12-14 19:33:03,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41274636] [2021-12-14 19:33:03,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:03,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-14 19:33:03,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-14 19:33:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2169, Unknown=14, NotChecked=0, Total=2352 [2021-12-14 19:33:03,970 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:06,572 INFO L93 Difference]: Finished difference Result 294 states and 328 transitions. [2021-12-14 19:33:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-14 19:33:06,573 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-14 19:33:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:06,574 INFO L225 Difference]: With dead ends: 294 [2021-12-14 19:33:06,574 INFO L226 Difference]: Without dead ends: 260 [2021-12-14 19:33:06,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=569, Invalid=7746, Unknown=57, NotChecked=0, Total=8372 [2021-12-14 19:33:06,578 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 179 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:06,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 639 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 490 Invalid, 0 Unknown, 432 Unchecked, 0.2s Time] [2021-12-14 19:33:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-14 19:33:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 249. [2021-12-14 19:33:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 246 states have (on average 1.1341463414634145) internal successors, (279), 248 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) [2021-12-14 19:33:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2021-12-14 19:33:06,587 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 36 [2021-12-14 19:33:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:06,587 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2021-12-14 19:33:06,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2021-12-14 19:33:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 19:33:06,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:06,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:06,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:06,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:06,806 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash -541196940, now seen corresponding path program 5 times [2021-12-14 19:33:06,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:06,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800434270] [2021-12-14 19:33:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:06,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:06,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800434270] [2021-12-14 19:33:06,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800434270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623335545] [2021-12-14 19:33:06,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 19:33:06,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:06,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:07,007 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:07,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 19:33:07,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-14 19:33:07,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:07,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-14 19:33:07,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:07,126 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:33:07,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:33:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:07,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:07,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623335545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:07,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:07,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2021-12-14 19:33:07,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335349659] [2021-12-14 19:33:07,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:07,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 19:33:07,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 19:33:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-12-14 19:33:07,662 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:08,260 INFO L93 Difference]: Finished difference Result 389 states and 424 transitions. [2021-12-14 19:33:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 19:33:08,260 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-14 19:33:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:08,261 INFO L225 Difference]: With dead ends: 389 [2021-12-14 19:33:08,261 INFO L226 Difference]: Without dead ends: 389 [2021-12-14 19:33:08,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2021-12-14 19:33:08,262 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 281 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:08,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 346 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:33:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-14 19:33:08,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 258. [2021-12-14 19:33:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 255 states have (on average 1.1372549019607843) internal successors, (290), 257 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 290 transitions. [2021-12-14 19:33:08,267 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 290 transitions. Word has length 37 [2021-12-14 19:33:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:08,268 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 290 transitions. [2021-12-14 19:33:08,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 290 transitions. [2021-12-14 19:33:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 19:33:08,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:08,268 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:08,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-14 19:33:08,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:08,479 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:08,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:08,480 INFO L85 PathProgramCache]: Analyzing trace with hash -916383204, now seen corresponding path program 1 times [2021-12-14 19:33:08,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:08,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385987760] [2021-12-14 19:33:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:08,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:08,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:08,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385987760] [2021-12-14 19:33:08,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385987760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:08,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906335575] [2021-12-14 19:33:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:08,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:08,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:08,628 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:08,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 19:33:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:08,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-14 19:33:08,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:08,734 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:33:08,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:33:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:09,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:09,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906335575] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:09,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:09,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2021-12-14 19:33:09,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764336363] [2021-12-14 19:33:09,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:09,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 19:33:09,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:09,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 19:33:09,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 19:33:09,403 INFO L87 Difference]: Start difference. First operand 258 states and 290 transitions. Second operand has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:10,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:10,576 INFO L93 Difference]: Finished difference Result 342 states and 371 transitions. [2021-12-14 19:33:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 19:33:10,577 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 19:33:10,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:10,577 INFO L225 Difference]: With dead ends: 342 [2021-12-14 19:33:10,577 INFO L226 Difference]: Without dead ends: 317 [2021-12-14 19:33:10,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=3076, Unknown=0, NotChecked=0, Total=3782 [2021-12-14 19:33:10,578 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 473 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:10,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 363 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:33:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-14 19:33:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 256. [2021-12-14 19:33:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 253 states have (on average 1.1264822134387351) internal successors, (285), 255 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2021-12-14 19:33:10,582 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 39 [2021-12-14 19:33:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:10,582 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2021-12-14 19:33:10,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2021-12-14 19:33:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 19:33:10,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:10,583 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:10,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:10,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:10,784 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash 509207573, now seen corresponding path program 6 times [2021-12-14 19:33:10,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:10,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820521030] [2021-12-14 19:33:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:10,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:33:10,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:10,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820521030] [2021-12-14 19:33:10,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820521030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:10,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508512577] [2021-12-14 19:33:10,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 19:33:10,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:10,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:10,886 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:10,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 19:33:10,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-14 19:33:10,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:10,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 19:33:10,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:11,029 INFO L388 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 14 treesize of output 10 [2021-12-14 19:33:11,102 INFO L388 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 [2021-12-14 19:33:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:33:11,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:11,142 INFO L388 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 13 [2021-12-14 19:33:11,143 INFO L388 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 26 treesize of output 22 [2021-12-14 19:33:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:33:11,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508512577] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:11,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:11,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2021-12-14 19:33:11,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60067476] [2021-12-14 19:33:11,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:11,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 19:33:11,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 19:33:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-12-14 19:33:11,224 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:11,516 INFO L93 Difference]: Finished difference Result 488 states and 529 transitions. [2021-12-14 19:33:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 19:33:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-14 19:33:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:11,524 INFO L225 Difference]: With dead ends: 488 [2021-12-14 19:33:11,524 INFO L226 Difference]: Without dead ends: 460 [2021-12-14 19:33:11,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 19:33:11,526 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 260 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:11,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 623 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 571 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-12-14 19:33:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-14 19:33:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 291. [2021-12-14 19:33:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 288 states have (on average 1.1284722222222223) internal successors, (325), 290 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 325 transitions. [2021-12-14 19:33:11,543 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 325 transitions. Word has length 40 [2021-12-14 19:33:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:11,545 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 325 transitions. [2021-12-14 19:33:11,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 325 transitions. [2021-12-14 19:33:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 19:33:11,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:11,546 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:11,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:11,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:11,763 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 500447765, now seen corresponding path program 5 times [2021-12-14 19:33:11,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:11,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345655636] [2021-12-14 19:33:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:11,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:11,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:11,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345655636] [2021-12-14 19:33:11,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345655636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:11,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581991380] [2021-12-14 19:33:11,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 19:33:11,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:11,882 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:11,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 19:33:11,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-14 19:33:11,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:11,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-14 19:33:11,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:12,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:33:12,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:33:12,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:33:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:12,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:12,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581991380] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:12,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:12,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2021-12-14 19:33:12,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612585918] [2021-12-14 19:33:12,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:12,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 19:33:12,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:12,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 19:33:12,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-12-14 19:33:12,468 INFO L87 Difference]: Start difference. First operand 291 states and 325 transitions. Second operand has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:12,964 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2021-12-14 19:33:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:33:12,965 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-14 19:33:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:12,966 INFO L225 Difference]: With dead ends: 387 [2021-12-14 19:33:12,966 INFO L226 Difference]: Without dead ends: 387 [2021-12-14 19:33:12,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 19:33:12,967 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 417 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:12,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 523 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:33:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-14 19:33:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 329. [2021-12-14 19:33:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 326 states have (on average 1.138036809815951) internal successors, (371), 328 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 371 transitions. [2021-12-14 19:33:12,973 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 371 transitions. Word has length 40 [2021-12-14 19:33:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:12,973 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 371 transitions. [2021-12-14 19:33:12,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 371 transitions. [2021-12-14 19:33:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 19:33:12,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:12,974 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:13,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:13,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:13,191 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2139029910, now seen corresponding path program 1 times [2021-12-14 19:33:13,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:13,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262636275] [2021-12-14 19:33:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:13,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 19:33:13,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:13,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262636275] [2021-12-14 19:33:13,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262636275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:13,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924484880] [2021-12-14 19:33:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:13,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:13,446 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:13,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-14 19:33:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-14 19:33:13,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:13,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:33:13,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-14 19:33:13,749 INFO L388 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 17 treesize of output 19 [2021-12-14 19:33:13,885 INFO L388 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 17 treesize of output 19 [2021-12-14 19:33:13,922 INFO L388 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 14 treesize of output 16 [2021-12-14 19:33:13,945 INFO L388 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 [2021-12-14 19:33:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 19:33:13,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:13,970 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_769) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-14 19:33:13,979 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_769) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:13,987 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_768 (Array Int Int)) (v_ArrVal_769 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_768) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_769) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:13,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_769) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-14 19:33:14,017 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_769) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-14 19:33:14,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:14,027 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-14 19:33:14,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:14,033 INFO L388 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 37 treesize of output 37 [2021-12-14 19:33:14,036 INFO L388 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 11 treesize of output 7 [2021-12-14 19:33:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 11 not checked. [2021-12-14 19:33:14,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924484880] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:14,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:14,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 32 [2021-12-14 19:33:14,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532710374] [2021-12-14 19:33:14,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:14,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 19:33:14,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:14,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 19:33:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=627, Unknown=5, NotChecked=270, Total=992 [2021-12-14 19:33:14,336 INFO L87 Difference]: Start difference. First operand 329 states and 371 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:14,778 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2021-12-14 19:33:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 19:33:14,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-14 19:33:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:14,780 INFO L225 Difference]: With dead ends: 383 [2021-12-14 19:33:14,780 INFO L226 Difference]: Without dead ends: 343 [2021-12-14 19:33:14,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=997, Unknown=5, NotChecked=340, Total=1482 [2021-12-14 19:33:14,781 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 87 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:14,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 849 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 526 Invalid, 0 Unknown, 452 Unchecked, 0.2s Time] [2021-12-14 19:33:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-14 19:33:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2021-12-14 19:33:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 321 states have (on average 1.1214953271028036) internal successors, (360), 323 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 360 transitions. [2021-12-14 19:33:14,787 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 360 transitions. Word has length 43 [2021-12-14 19:33:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:14,787 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 360 transitions. [2021-12-14 19:33:14,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 360 transitions. [2021-12-14 19:33:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 19:33:14,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:14,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:14,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:15,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:15,007 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:15,007 INFO L85 PathProgramCache]: Analyzing trace with hash -203339112, now seen corresponding path program 7 times [2021-12-14 19:33:15,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:15,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827426926] [2021-12-14 19:33:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:15,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:15,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827426926] [2021-12-14 19:33:15,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827426926] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098998012] [2021-12-14 19:33:15,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 19:33:15,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:15,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:15,170 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:15,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-14 19:33:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-14 19:33:15,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:15,295 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:33:15,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:33:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:15,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:15,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098998012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:15,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:15,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2021-12-14 19:33:15,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679768074] [2021-12-14 19:33:15,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:15,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-14 19:33:15,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:15,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-14 19:33:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 19:33:15,997 INFO L87 Difference]: Start difference. First operand 324 states and 360 transitions. Second operand has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:16,931 INFO L93 Difference]: Finished difference Result 558 states and 603 transitions. [2021-12-14 19:33:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 19:33:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-14 19:33:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:16,932 INFO L225 Difference]: With dead ends: 558 [2021-12-14 19:33:16,933 INFO L226 Difference]: Without dead ends: 558 [2021-12-14 19:33:16,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2021-12-14 19:33:16,934 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 438 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:16,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 548 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 19:33:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-14 19:33:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 336. [2021-12-14 19:33:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 333 states have (on average 1.1261261261261262) internal successors, (375), 335 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) [2021-12-14 19:33:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 375 transitions. [2021-12-14 19:33:16,938 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 375 transitions. Word has length 44 [2021-12-14 19:33:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:16,938 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 375 transitions. [2021-12-14 19:33:16,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 375 transitions. [2021-12-14 19:33:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 19:33:16,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:16,939 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:16,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:17,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-14 19:33:17,154 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:17,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:17,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1180553501, now seen corresponding path program 6 times [2021-12-14 19:33:17,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:17,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138496019] [2021-12-14 19:33:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:17,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:17,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:17,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138496019] [2021-12-14 19:33:17,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138496019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:17,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692993809] [2021-12-14 19:33:17,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 19:33:17,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:17,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:17,457 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:17,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-14 19:33:17,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-14 19:33:17,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:17,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-14 19:33:17,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:17,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:33:17,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-14 19:33:17,768 INFO L388 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 17 treesize of output 19 [2021-12-14 19:33:17,943 INFO L388 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 17 treesize of output 19 [2021-12-14 19:33:18,016 INFO L388 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 16 treesize of output 18 [2021-12-14 19:33:18,028 INFO L388 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 14 treesize of output 16 [2021-12-14 19:33:18,033 INFO L388 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 [2021-12-14 19:33:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:18,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:18,044 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-14 19:33:18,048 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:18,053 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int)) (v_ArrVal_857 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_857) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:18,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-14 19:33:18,063 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_856 (Array Int Int)) (v_ArrVal_858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_856) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-14 19:33:18,068 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-14 19:33:18,073 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_858) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-14 19:33:18,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:18,079 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-14 19:33:18,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:18,082 INFO L388 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 37 treesize of output 37 [2021-12-14 19:33:18,085 INFO L388 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 11 treesize of output 7 [2021-12-14 19:33:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2021-12-14 19:33:18,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692993809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:18,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:18,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 40 [2021-12-14 19:33:18,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429622394] [2021-12-14 19:33:18,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:18,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-14 19:33:18,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:18,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-14 19:33:18,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=965, Unknown=7, NotChecked=476, Total=1560 [2021-12-14 19:33:18,205 INFO L87 Difference]: Start difference. First operand 336 states and 375 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:18,702 INFO L93 Difference]: Finished difference Result 500 states and 552 transitions. [2021-12-14 19:33:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 19:33:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 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 44 [2021-12-14 19:33:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:18,704 INFO L225 Difference]: With dead ends: 500 [2021-12-14 19:33:18,704 INFO L226 Difference]: Without dead ends: 461 [2021-12-14 19:33:18,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=1492, Unknown=7, NotChecked=588, Total=2256 [2021-12-14 19:33:18,705 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 98 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 731 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:18,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1212 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 820 Invalid, 0 Unknown, 731 Unchecked, 0.2s Time] [2021-12-14 19:33:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-14 19:33:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 427. [2021-12-14 19:33:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 424 states have (on average 1.1273584905660377) internal successors, (478), 426 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:18,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 478 transitions. [2021-12-14 19:33:18,709 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 478 transitions. Word has length 44 [2021-12-14 19:33:18,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:18,710 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 478 transitions. [2021-12-14 19:33:18,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 478 transitions. [2021-12-14 19:33:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 19:33:18,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:18,714 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:18,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:18,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-14 19:33:18,930 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1771580303, now seen corresponding path program 8 times [2021-12-14 19:33:18,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:18,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134342715] [2021-12-14 19:33:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:18,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:33:19,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:19,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134342715] [2021-12-14 19:33:19,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134342715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:19,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95012237] [2021-12-14 19:33:19,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:33:19,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:19,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:19,097 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:19,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-14 19:33:19,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:33:19,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:19,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-14 19:33:19,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:19,302 INFO L388 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 14 treesize of output 10 [2021-12-14 19:33:19,387 INFO L388 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 [2021-12-14 19:33:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:33:19,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:19,458 INFO L388 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 13 [2021-12-14 19:33:19,460 INFO L388 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 26 treesize of output 22 [2021-12-14 19:33:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:33:19,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95012237] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:19,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:19,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 30 [2021-12-14 19:33:19,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499366849] [2021-12-14 19:33:19,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:19,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 19:33:19,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:19,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 19:33:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-12-14 19:33:19,567 INFO L87 Difference]: Start difference. First operand 427 states and 478 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:20,013 INFO L93 Difference]: Finished difference Result 895 states and 967 transitions. [2021-12-14 19:33:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 19:33:20,013 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-14 19:33:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:20,015 INFO L225 Difference]: With dead ends: 895 [2021-12-14 19:33:20,015 INFO L226 Difference]: Without dead ends: 878 [2021-12-14 19:33:20,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 19:33:20,016 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 291 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:20,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 1035 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 987 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2021-12-14 19:33:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-14 19:33:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 515. [2021-12-14 19:33:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 512 states have (on average 1.126953125) internal successors, (577), 514 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 577 transitions. [2021-12-14 19:33:20,054 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 577 transitions. Word has length 47 [2021-12-14 19:33:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:20,054 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 577 transitions. [2021-12-14 19:33:20,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 577 transitions. [2021-12-14 19:33:20,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 19:33:20,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:20,055 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:20,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:20,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-14 19:33:20,271 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash 588049120, now seen corresponding path program 7 times [2021-12-14 19:33:20,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:20,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835683855] [2021-12-14 19:33:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:20,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:20,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:20,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835683855] [2021-12-14 19:33:20,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835683855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:20,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209921574] [2021-12-14 19:33:20,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 19:33:20,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:20,464 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:20,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-14 19:33:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-14 19:33:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:33:20,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:33:20,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:33:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:20,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:21,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209921574] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:21,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:21,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-14 19:33:21,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745339029] [2021-12-14 19:33:21,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:21,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-14 19:33:21,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-14 19:33:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 19:33:21,333 INFO L87 Difference]: Start difference. First operand 515 states and 577 transitions. Second operand has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:22,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:22,283 INFO L93 Difference]: Finished difference Result 558 states and 611 transitions. [2021-12-14 19:33:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 19:33:22,284 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-14 19:33:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:22,286 INFO L225 Difference]: With dead ends: 558 [2021-12-14 19:33:22,286 INFO L226 Difference]: Without dead ends: 558 [2021-12-14 19:33:22,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=642, Invalid=3018, Unknown=0, NotChecked=0, Total=3660 [2021-12-14 19:33:22,287 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 502 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:22,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 726 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:33:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-14 19:33:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 520. [2021-12-14 19:33:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 517 states have (on average 1.125725338491296) internal successors, (582), 519 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 582 transitions. [2021-12-14 19:33:22,292 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 582 transitions. Word has length 48 [2021-12-14 19:33:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:22,292 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 582 transitions. [2021-12-14 19:33:22,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 582 transitions. [2021-12-14 19:33:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 19:33:22,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:22,293 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:22,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:22,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:22,503 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:22,504 INFO L85 PathProgramCache]: Analyzing trace with hash 615332876, now seen corresponding path program 2 times [2021-12-14 19:33:22,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:22,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521568059] [2021-12-14 19:33:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:22,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:22,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:22,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521568059] [2021-12-14 19:33:22,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521568059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:22,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522565754] [2021-12-14 19:33:22,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:33:22,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:22,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:22,672 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:22,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-14 19:33:22,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:33:22,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:22,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 19:33:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:22,790 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:33:22,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:33:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:33:23,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:33:23,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522565754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:23,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:23,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-14 19:33:23,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573060335] [2021-12-14 19:33:23,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:23,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-14 19:33:23,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:23,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-14 19:33:23,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 19:33:23,614 INFO L87 Difference]: Start difference. First operand 520 states and 582 transitions. Second operand has 39 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:26,162 INFO L93 Difference]: Finished difference Result 678 states and 735 transitions. [2021-12-14 19:33:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-14 19:33:26,163 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-14 19:33:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:26,164 INFO L225 Difference]: With dead ends: 678 [2021-12-14 19:33:26,164 INFO L226 Difference]: Without dead ends: 629 [2021-12-14 19:33:26,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1415, Invalid=6067, Unknown=0, NotChecked=0, Total=7482 [2021-12-14 19:33:26,165 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 854 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:26,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 675 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 19:33:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-12-14 19:33:26,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 531. [2021-12-14 19:33:26,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 528 states have (on average 1.1174242424242424) internal successors, (590), 530 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 590 transitions. [2021-12-14 19:33:26,170 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 590 transitions. Word has length 48 [2021-12-14 19:33:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:26,170 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 590 transitions. [2021-12-14 19:33:26,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 590 transitions. [2021-12-14 19:33:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 19:33:26,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:26,171 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:26,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:26,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-14 19:33:26,387 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1424251762, now seen corresponding path program 9 times [2021-12-14 19:33:26,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:26,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541532466] [2021-12-14 19:33:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:26,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:26,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:26,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541532466] [2021-12-14 19:33:26,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541532466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:26,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792422564] [2021-12-14 19:33:26,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:33:26,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:26,553 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:26,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-14 19:33:26,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-14 19:33:26,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-14 19:33:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:26,679 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:33:26,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:33:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:27,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:27,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792422564] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:27,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:27,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2021-12-14 19:33:27,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320304865] [2021-12-14 19:33:27,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:27,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-14 19:33:27,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-14 19:33:27,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2021-12-14 19:33:27,390 INFO L87 Difference]: Start difference. First operand 531 states and 590 transitions. Second operand has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:28,285 INFO L93 Difference]: Finished difference Result 963 states and 1037 transitions. [2021-12-14 19:33:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 19:33:28,286 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-14 19:33:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:28,288 INFO L225 Difference]: With dead ends: 963 [2021-12-14 19:33:28,288 INFO L226 Difference]: Without dead ends: 963 [2021-12-14 19:33:28,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=996, Invalid=4116, Unknown=0, NotChecked=0, Total=5112 [2021-12-14 19:33:28,289 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 538 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:28,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 583 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:33:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-14 19:33:28,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 546. [2021-12-14 19:33:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 543 states have (on average 1.1215469613259668) internal successors, (609), 545 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 609 transitions. [2021-12-14 19:33:28,295 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 609 transitions. Word has length 51 [2021-12-14 19:33:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:28,296 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 609 transitions. [2021-12-14 19:33:28,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 609 transitions. [2021-12-14 19:33:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 19:33:28,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:28,297 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:28,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:28,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:28,513 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1427430296, now seen corresponding path program 8 times [2021-12-14 19:33:28,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:28,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255263263] [2021-12-14 19:33:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:28,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:29,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255263263] [2021-12-14 19:33:29,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255263263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199628660] [2021-12-14 19:33:29,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:33:29,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:29,090 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:29,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-14 19:33:29,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:33:29,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:29,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-14 19:33:29,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:29,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:33:29,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-14 19:33:29,500 INFO L388 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 17 treesize of output 19 [2021-12-14 19:33:29,621 INFO L388 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 17 treesize of output 19 [2021-12-14 19:33:29,671 INFO L388 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 16 treesize of output 18 [2021-12-14 19:33:29,704 INFO L388 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 16 treesize of output 18 [2021-12-14 19:33:29,717 INFO L388 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 14 treesize of output 16 [2021-12-14 19:33:29,739 INFO L388 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 [2021-12-14 19:33:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:29,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:29,751 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-14 19:33:29,755 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:29,759 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int)) (v_ArrVal_1097 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1097) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:29,769 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-14 19:33:29,773 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int)) (v_ArrVal_1096 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-14 19:33:29,777 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2021-12-14 19:33:29,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int)) (v_ArrVal_1095 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1095) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-14 19:33:29,786 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-14 19:33:29,791 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1098) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-14 19:33:29,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:29,796 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-14 19:33:29,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:29,804 INFO L388 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 37 treesize of output 37 [2021-12-14 19:33:29,806 INFO L388 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 11 treesize of output 7 [2021-12-14 19:33:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 39 not checked. [2021-12-14 19:33:29,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199628660] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:29,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:29,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 21] total 51 [2021-12-14 19:33:29,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760160461] [2021-12-14 19:33:29,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:29,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-14 19:33:29,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-14 19:33:29,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1620, Unknown=9, NotChecked=792, Total=2550 [2021-12-14 19:33:29,948 INFO L87 Difference]: Start difference. First operand 546 states and 609 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:30,925 INFO L93 Difference]: Finished difference Result 658 states and 728 transitions. [2021-12-14 19:33:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 19:33:30,925 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-14 19:33:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:30,927 INFO L225 Difference]: With dead ends: 658 [2021-12-14 19:33:30,927 INFO L226 Difference]: Without dead ends: 611 [2021-12-14 19:33:30,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=249, Invalid=3438, Unknown=9, NotChecked=1134, Total=4830 [2021-12-14 19:33:30,933 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 164 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:30,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1492 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1095 Invalid, 0 Unknown, 763 Unchecked, 0.3s Time] [2021-12-14 19:33:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-12-14 19:33:30,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 601. [2021-12-14 19:33:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 598 states have (on average 1.120401337792642) internal successors, (670), 600 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 670 transitions. [2021-12-14 19:33:30,940 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 670 transitions. Word has length 52 [2021-12-14 19:33:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:30,941 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 670 transitions. [2021-12-14 19:33:30,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 670 transitions. [2021-12-14 19:33:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 19:33:30,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:30,942 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:30,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:31,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-14 19:33:31,155 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1083226314, now seen corresponding path program 3 times [2021-12-14 19:33:31,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:31,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745825917] [2021-12-14 19:33:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:31,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:31,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:31,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745825917] [2021-12-14 19:33:31,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745825917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:31,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672965996] [2021-12-14 19:33:31,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:33:31,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:31,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:31,398 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:31,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-14 19:33:31,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-14 19:33:31,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:31,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-14 19:33:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:31,547 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:33:31,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:33:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:33:31,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:33:32,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672965996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:32,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:32,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2021-12-14 19:33:32,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725528568] [2021-12-14 19:33:32,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:32,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-14 19:33:32,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:32,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-14 19:33:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 19:33:32,312 INFO L87 Difference]: Start difference. First operand 601 states and 670 transitions. Second operand has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:34,512 INFO L93 Difference]: Finished difference Result 913 states and 980 transitions. [2021-12-14 19:33:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-14 19:33:34,512 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-14 19:33:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:34,514 INFO L225 Difference]: With dead ends: 913 [2021-12-14 19:33:34,514 INFO L226 Difference]: Without dead ends: 821 [2021-12-14 19:33:34,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2093, Invalid=8827, Unknown=0, NotChecked=0, Total=10920 [2021-12-14 19:33:34,516 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 761 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:34,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 725 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 19:33:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-12-14 19:33:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 553. [2021-12-14 19:33:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 550 states have (on average 1.1090909090909091) internal successors, (610), 552 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 610 transitions. [2021-12-14 19:33:34,522 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 610 transitions. Word has length 53 [2021-12-14 19:33:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:34,523 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 610 transitions. [2021-12-14 19:33:34,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 610 transitions. [2021-12-14 19:33:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 19:33:34,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:34,524 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:34,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:34,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:34,737 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:33:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:34,737 INFO L85 PathProgramCache]: Analyzing trace with hash 97693371, now seen corresponding path program 10 times [2021-12-14 19:33:34,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:34,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131369779] [2021-12-14 19:33:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:34,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:33:34,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131369779] [2021-12-14 19:33:34,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131369779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883014470] [2021-12-14 19:33:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:33:34,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:34,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:34,933 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:34,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-14 19:33:35,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:33:35,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:35,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-14 19:33:35,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:35,213 INFO L388 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 14 treesize of output 10 [2021-12-14 19:33:44,287 INFO L354 Elim1Store]: treesize reduction 223, result has 9.7 percent of original size [2021-12-14 19:33:44,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 50 [2021-12-14 19:33:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 46 proven. 50 refuted. 17 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:33:44,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:44,959 INFO L388 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 89 treesize of output 77 [2021-12-14 19:33:44,964 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-12-14 19:33:44,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 145 treesize of output 123 [2021-12-14 19:33:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:33:45,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883014470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:45,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:45,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 28] total 65 [2021-12-14 19:33:45,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648417797] [2021-12-14 19:33:45,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:45,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-14 19:33:45,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:45,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-14 19:33:45,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=3663, Unknown=26, NotChecked=0, Total=4160 [2021-12-14 19:33:45,253 INFO L87 Difference]: Start difference. First operand 553 states and 610 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 65 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)