./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/ldv-memsafety/ArraysOfVariableLength6.c -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 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:35:09,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:35:09,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:35:09,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:35:09,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:35:09,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:35:09,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:35:09,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:35:09,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:35:09,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:35:09,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:35:09,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:35:09,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:35:09,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:35:09,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:35:09,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:35:09,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:35:09,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:35:09,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:35:09,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:35:09,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:35:09,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:35:09,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:35:09,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:35:09,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:35:09,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:35:09,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:35:09,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:35:09,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:35:09,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:35:09,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:35:09,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:35:09,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:35:09,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:35:09,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:35:09,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:35:09,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:35:09,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:35:09,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:35:09,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:35:09,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:35:09,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:35:09,368 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:35:09,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:35:09,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:35:09,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:35:09,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:35:09,370 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:35:09,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:35:09,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:35:09,370 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:35:09,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:35:09,376 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:35:09,376 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:35:09,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:35:09,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:35:09,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:35:09,377 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:35:09,377 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:35:09,377 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:35:09,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:35:09,378 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:35:09,378 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:35:09,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:35:09,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:35:09,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:35:09,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:35:09,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:35:09,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:35:09,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:35:09,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:35:09,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:35:09,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:35:09,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2021-12-22 16:35:09,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:35:09,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:35:09,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:35:09,600 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:35:09,601 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:35:09,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-12-22 16:35:09,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a84ab0f7/c555e8b7bc9d422bafefeb0c1f4a71d9/FLAG4af906b56 [2021-12-22 16:35:10,026 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:35:10,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-12-22 16:35:10,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a84ab0f7/c555e8b7bc9d422bafefeb0c1f4a71d9/FLAG4af906b56 [2021-12-22 16:35:10,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a84ab0f7/c555e8b7bc9d422bafefeb0c1f4a71d9 [2021-12-22 16:35:10,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:35:10,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:35:10,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:35:10,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:35:10,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:35:10,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b19f710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10, skipping insertion in model container [2021-12-22 16:35:10,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:35:10,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:35:10,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:35:10,265 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:35:10,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:35:10,295 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:35:10,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10 WrapperNode [2021-12-22 16:35:10,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:35:10,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:35:10,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:35:10,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:35:10,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,326 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-12-22 16:35:10,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:35:10,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:35:10,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:35:10,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:35:10,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:35:10,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:35:10,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:35:10,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:35:10,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (1/1) ... [2021-12-22 16:35:10,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:35:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:10,386 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) [2021-12-22 16:35:10,393 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 [2021-12-22 16:35:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:35:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:35:10,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:35:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:35:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 16:35:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:35:10,470 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:35:10,471 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:35:10,583 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:35:10,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:35:10,589 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 16:35:10,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:10 BoogieIcfgContainer [2021-12-22 16:35:10,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:35:10,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:35:10,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:35:10,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:35:10,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:35:10" (1/3) ... [2021-12-22 16:35:10,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a2aca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:10, skipping insertion in model container [2021-12-22 16:35:10,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:10" (2/3) ... [2021-12-22 16:35:10,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a2aca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:10, skipping insertion in model container [2021-12-22 16:35:10,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:10" (3/3) ... [2021-12-22 16:35:10,598 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2021-12-22 16:35:10,603 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:35:10,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-22 16:35:10,640 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:35:10,647 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 [2021-12-22 16:35:10,647 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-22 16:35:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 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) [2021-12-22 16:35:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 16:35:10,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:10,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 16:35:10,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-12-22 16:35:10,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:10,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199063181] [2021-12-22 16:35:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:10,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:10,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:10,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199063181] [2021-12-22 16:35:10,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199063181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:10,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:10,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:35:10,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569115928] [2021-12-22 16:35:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:10,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:35:10,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:35:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:35:10,941 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:10,996 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-22 16:35:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:35:10,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-22 16:35:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:11,005 INFO L225 Difference]: With dead ends: 59 [2021-12-22 16:35:11,005 INFO L226 Difference]: Without dead ends: 55 [2021-12-22 16:35:11,007 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 [2021-12-22 16:35:11,010 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:11,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:11,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-22 16:35:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-12-22 16:35:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-22 16:35:11,038 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-12-22 16:35:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:11,039 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-22 16:35:11,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-22 16:35:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:35:11,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:11,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:35:11,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:35:11,040 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-12-22 16:35:11,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:11,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426203825] [2021-12-22 16:35:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:11,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:11,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426203825] [2021-12-22 16:35:11,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426203825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:11,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:11,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:35:11,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758234290] [2021-12-22 16:35:11,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:11,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:35:11,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:11,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:35:11,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:35:11,077 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:11,110 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-12-22 16:35:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:35:11,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:35:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:11,112 INFO L225 Difference]: With dead ends: 58 [2021-12-22 16:35:11,112 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 16:35:11,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:35:11,121 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:11,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 16:35:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-12-22 16:35:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 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) [2021-12-22 16:35:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-22 16:35:11,144 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-22 16:35:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:11,144 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-22 16:35:11,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-22 16:35:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:35:11,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:11,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:35:11,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:35:11,146 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-12-22 16:35:11,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:11,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102789853] [2021-12-22 16:35:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:11,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:11,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:11,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102789853] [2021-12-22 16:35:11,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102789853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:11,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:11,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:35:11,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120698644] [2021-12-22 16:35:11,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:11,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:11,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:35:11,221 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:11,272 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-12-22 16:35:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:35:11,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:35:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:11,273 INFO L225 Difference]: With dead ends: 32 [2021-12-22 16:35:11,273 INFO L226 Difference]: Without dead ends: 32 [2021-12-22 16:35:11,274 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 [2021-12-22 16:35:11,275 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 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 [2021-12-22 16:35:11,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-22 16:35:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-22 16:35:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-22 16:35:11,289 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-22 16:35:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:11,290 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-22 16:35:11,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-22 16:35:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:35:11,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:11,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:35:11,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 16:35:11,293 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-12-22 16:35:11,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:11,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030843055] [2021-12-22 16:35:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:11,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:11,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:11,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030843055] [2021-12-22 16:35:11,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030843055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:11,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:11,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:35:11,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169160260] [2021-12-22 16:35:11,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:11,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:11,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:11,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:11,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:35:11,395 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:11,483 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-12-22 16:35:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:35:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:35:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:11,485 INFO L225 Difference]: With dead ends: 55 [2021-12-22 16:35:11,485 INFO L226 Difference]: Without dead ends: 55 [2021-12-22 16:35:11,486 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 [2021-12-22 16:35:11,487 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:11,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-22 16:35:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-12-22 16:35:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 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) [2021-12-22 16:35:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-22 16:35:11,492 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-22 16:35:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:11,492 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-22 16:35:11,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-22 16:35:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:35:11,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:11,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:11,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 16:35:11,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:11,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:11,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-12-22 16:35:11,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:11,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645721293] [2021-12-22 16:35:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:11,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:11,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:11,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645721293] [2021-12-22 16:35:11,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645721293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:11,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:11,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:35:11,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176936928] [2021-12-22 16:35:11,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:11,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:35:11,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:11,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:35:11,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:35:11,558 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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) [2021-12-22 16:35:11,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:11,579 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-22 16:35:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:35:11,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 [2021-12-22 16:35:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:11,583 INFO L225 Difference]: With dead ends: 35 [2021-12-22 16:35:11,584 INFO L226 Difference]: Without dead ends: 35 [2021-12-22 16:35:11,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:35:11,586 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:11,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-22 16:35:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-22 16:35:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-22 16:35:11,591 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2021-12-22 16:35:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:11,591 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-22 16:35:11,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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) [2021-12-22 16:35:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-22 16:35:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:35:11,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:11,592 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:11,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 16:35:11,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-12-22 16:35:11,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:11,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835571318] [2021-12-22 16:35:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:11,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:11,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:11,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835571318] [2021-12-22 16:35:11,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835571318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:11,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310075434] [2021-12-22 16:35:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:11,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:11,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:11,639 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) [2021-12-22 16:35:11,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:35:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:11,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:35:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:11,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:11,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310075434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:11,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:11,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-22 16:35:11,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774197934] [2021-12-22 16:35:11,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:11,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:35:11,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:11,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:35:11,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:35:11,808 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-12-22 16:35:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:11,861 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-12-22 16:35:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:35:11,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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 10 [2021-12-22 16:35:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:11,864 INFO L225 Difference]: With dead ends: 109 [2021-12-22 16:35:11,864 INFO L226 Difference]: Without dead ends: 109 [2021-12-22 16:35:11,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:35:11,866 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:11,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 104 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-22 16:35:11,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 47. [2021-12-22 16:35:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.375) 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) [2021-12-22 16:35:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-22 16:35:11,872 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 10 [2021-12-22 16:35:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:11,873 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-22 16:35:11,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-12-22 16:35:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-22 16:35:11,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:35:11,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:11,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:11,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:12,099 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,SelfDestructingSolverStorable5 [2021-12-22 16:35:12,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:12,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:12,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2021-12-22 16:35:12,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:12,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347361314] [2021-12-22 16:35:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:12,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:12,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:12,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347361314] [2021-12-22 16:35:12,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347361314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:12,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989000410] [2021-12-22 16:35:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:12,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:12,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:12,214 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) [2021-12-22 16:35:12,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:35:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:12,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-22 16:35:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:12,324 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:35:12,325 INFO L387 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 [2021-12-22 16:35:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:12,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:12,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989000410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:12,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:12,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-22 16:35:12,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395682646] [2021-12-22 16:35:12,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:12,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:35:12,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:12,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:35:12,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:12,533 INFO L87 Difference]: Start difference. First operand 47 states and 55 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) [2021-12-22 16:35:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:12,738 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2021-12-22 16:35:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:35:12,739 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 11 [2021-12-22 16:35:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:12,740 INFO L225 Difference]: With dead ends: 108 [2021-12-22 16:35:12,740 INFO L226 Difference]: Without dead ends: 108 [2021-12-22 16:35:12,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:35:12,741 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 297 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:12,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 87 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-22 16:35:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 48. [2021-12-22 16:35:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-22 16:35:12,746 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 11 [2021-12-22 16:35:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:12,746 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-22 16:35:12,747 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) [2021-12-22 16:35:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-22 16:35:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 16:35:12,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:12,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:12,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:12,963 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,SelfDestructingSolverStorable6 [2021-12-22 16:35:12,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:12,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2021-12-22 16:35:12,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:12,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870248076] [2021-12-22 16:35:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:12,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:13,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870248076] [2021-12-22 16:35:13,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870248076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224115877] [2021-12-22 16:35:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:13,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:13,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:13,028 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) [2021-12-22 16:35:13,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:35:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:13,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:35:13,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:13,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:13,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224115877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:13,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:13,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 16:35:13,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598307861] [2021-12-22 16:35:13,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:13,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:35:13,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:13,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:35:13,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:35:13,174 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:13,207 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-12-22 16:35:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:35:13,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-22 16:35:13,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:13,208 INFO L225 Difference]: With dead ends: 48 [2021-12-22 16:35:13,208 INFO L226 Difference]: Without dead ends: 48 [2021-12-22 16:35:13,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:35:13,211 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:13,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 87 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-22 16:35:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-22 16:35:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-12-22 16:35:13,220 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 12 [2021-12-22 16:35:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:13,221 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-12-22 16:35:13,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-12-22 16:35:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:35:13,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:13,222 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-12-22 16:35:13,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:13,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:13,436 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2021-12-22 16:35:13,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:13,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909823110] [2021-12-22 16:35:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:13,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:13,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909823110] [2021-12-22 16:35:13,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909823110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406498022] [2021-12-22 16:35:13,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:13,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:13,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:13,537 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) [2021-12-22 16:35:13,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:35:13,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:35:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:13,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:14,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406498022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:14,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:14,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-12-22 16:35:14,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300550356] [2021-12-22 16:35:14,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:14,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 16:35:14,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 16:35:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:35:14,212 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 19 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 19 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) [2021-12-22 16:35:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:14,388 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-12-22 16:35:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:35:14,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 19 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 25 [2021-12-22 16:35:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:14,391 INFO L225 Difference]: With dead ends: 96 [2021-12-22 16:35:14,391 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 16:35:14,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-12-22 16:35:14,394 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 217 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:14,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 16:35:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 47. [2021-12-22 16:35:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-12-22 16:35:14,414 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2021-12-22 16:35:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:14,415 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-12-22 16:35:14,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 19 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) [2021-12-22 16:35:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-12-22 16:35:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:35:14,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:14,416 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1] [2021-12-22 16:35:14,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:14,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:14,635 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1794938034, now seen corresponding path program 2 times [2021-12-22 16:35:14,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:14,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123933187] [2021-12-22 16:35:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:14,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-22 16:35:14,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:14,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123933187] [2021-12-22 16:35:14,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123933187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:14,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:14,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:35:14,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491256665] [2021-12-22 16:35:14,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:14,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:35:14,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:35:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:35:14,723 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2021-12-22 16:35:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:14,767 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-12-22 16:35:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:35:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 26 [2021-12-22 16:35:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:14,768 INFO L225 Difference]: With dead ends: 46 [2021-12-22 16:35:14,769 INFO L226 Difference]: Without dead ends: 46 [2021-12-22 16:35:14,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:35:14,769 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:14,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 33 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-22 16:35:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-12-22 16:35:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-12-22 16:35:14,776 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 26 [2021-12-22 16:35:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:14,777 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-12-22 16:35:14,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2021-12-22 16:35:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-12-22 16:35:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:35:14,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:14,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:14,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 16:35:14,778 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash 191446135, now seen corresponding path program 2 times [2021-12-22 16:35:14,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:14,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4292694] [2021-12-22 16:35:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:14,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:14,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4292694] [2021-12-22 16:35:14,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4292694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504461762] [2021-12-22 16:35:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:14,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:14,864 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) [2021-12-22 16:35:14,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:35:14,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:35:14,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:35:14,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:14,928 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:35:14,928 INFO L387 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 11 [2021-12-22 16:35:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 16:35:14,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:14,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504461762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:14,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:14,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 16:35:14,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031900725] [2021-12-22 16:35:14,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:14,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:35:14,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:35:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:35:14,994 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:15,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:15,006 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-12-22 16:35:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:35:15,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 16:35:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:15,007 INFO L225 Difference]: With dead ends: 42 [2021-12-22 16:35:15,007 INFO L226 Difference]: Without dead ends: 42 [2021-12-22 16:35:15,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:35:15,008 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:15,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-22 16:35:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-22 16:35:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-22 16:35:15,011 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 27 [2021-12-22 16:35:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:15,011 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-22 16:35:15,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:15,011 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-22 16:35:15,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:35:15,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:15,012 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:15,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:15,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 16:35:15,237 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash 191446136, now seen corresponding path program 1 times [2021-12-22 16:35:15,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:15,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236820500] [2021-12-22 16:35:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:15,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:15,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:15,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236820500] [2021-12-22 16:35:15,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236820500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:15,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58627320] [2021-12-22 16:35:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:15,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:15,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:15,324 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) [2021-12-22 16:35:15,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:35:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:35:15,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:15,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:15,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58627320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:15,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:15,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-12-22 16:35:15,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326201450] [2021-12-22 16:35:15,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:15,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 16:35:15,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 16:35:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:35:15,646 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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) [2021-12-22 16:35:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:15,715 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-12-22 16:35:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:35:15,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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 27 [2021-12-22 16:35:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:15,716 INFO L225 Difference]: With dead ends: 72 [2021-12-22 16:35:15,716 INFO L226 Difference]: Without dead ends: 72 [2021-12-22 16:35:15,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:35:15,717 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:15,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-22 16:35:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-22 16:35:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 71 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) [2021-12-22 16:35:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-12-22 16:35:15,721 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 27 [2021-12-22 16:35:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:15,722 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-12-22 16:35:15,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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) [2021-12-22 16:35:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-12-22 16:35:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 16:35:15,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:15,723 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:15,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:15,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:15,947 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:15,948 INFO L85 PathProgramCache]: Analyzing trace with hash 484543896, now seen corresponding path program 2 times [2021-12-22 16:35:15,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:15,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751375380] [2021-12-22 16:35:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:15,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:16,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:16,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751375380] [2021-12-22 16:35:16,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751375380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:16,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008834837] [2021-12-22 16:35:16,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:16,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:16,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:16,149 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) [2021-12-22 16:35:16,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:35:16,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:35:16,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:35:16,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:16,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:35:16,229 INFO L387 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 [2021-12-22 16:35:16,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:35:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-22 16:35:16,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:16,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008834837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:16,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:16,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 14 [2021-12-22 16:35:16,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574716207] [2021-12-22 16:35:16,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:16,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:35:16,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:35:16,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:35:16,604 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:16,627 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2021-12-22 16:35:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:35:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-22 16:35:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:16,629 INFO L225 Difference]: With dead ends: 128 [2021-12-22 16:35:16,629 INFO L226 Difference]: Without dead ends: 128 [2021-12-22 16:35:16,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:35:16,630 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:16,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-22 16:35:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-12-22 16:35:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 123 states have (on average 1.056910569105691) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-12-22 16:35:16,645 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 57 [2021-12-22 16:35:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:16,646 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-12-22 16:35:16,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-12-22 16:35:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 16:35:16,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:16,648 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:16,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:16,871 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1026867069, now seen corresponding path program 1 times [2021-12-22 16:35:16,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:16,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19955789] [2021-12-22 16:35:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:16,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-22 16:35:16,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:16,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19955789] [2021-12-22 16:35:16,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19955789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:16,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274205701] [2021-12-22 16:35:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:16,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:16,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:16,945 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) [2021-12-22 16:35:16,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:35:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:17,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:35:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:17,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:17,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274205701] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:17,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:17,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 13, 13] total 27 [2021-12-22 16:35:17,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268807956] [2021-12-22 16:35:17,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:17,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 16:35:17,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 16:35:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:35:17,694 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 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) [2021-12-22 16:35:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:18,779 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2021-12-22 16:35:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 16:35:18,780 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-22 16:35:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:18,781 INFO L225 Difference]: With dead ends: 252 [2021-12-22 16:35:18,781 INFO L226 Difference]: Without dead ends: 252 [2021-12-22 16:35:18,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1681, Invalid=3289, Unknown=0, NotChecked=0, Total=4970 [2021-12-22 16:35:18,791 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 482 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:18,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 52 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:35:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-22 16:35:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2021-12-22 16:35:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 244 states have (on average 1.028688524590164) internal successors, (251), 246 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2021-12-22 16:35:18,795 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 63 [2021-12-22 16:35:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:18,796 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2021-12-22 16:35:18,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 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) [2021-12-22 16:35:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2021-12-22 16:35:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 16:35:18,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:18,797 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:18,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 16:35:19,021 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,SelfDestructingSolverStorable13 [2021-12-22 16:35:19,022 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:19,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1510297113, now seen corresponding path program 1 times [2021-12-22 16:35:19,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:19,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733638682] [2021-12-22 16:35:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:19,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:19,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:19,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733638682] [2021-12-22 16:35:19,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733638682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:19,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653216705] [2021-12-22 16:35:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:19,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:19,470 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) [2021-12-22 16:35:19,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:35:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 16:35:19,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:20,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:21,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653216705] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:21,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:21,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2021-12-22 16:35:21,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224364697] [2021-12-22 16:35:21,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:21,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-22 16:35:21,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:21,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-22 16:35:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2021-12-22 16:35:21,900 INFO L87 Difference]: Start difference. First operand 247 states and 251 transitions. Second operand has 71 states, 71 states have (on average 4.929577464788732) internal successors, (350), 71 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:22,117 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2021-12-22 16:35:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 16:35:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.929577464788732) internal successors, (350), 71 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-12-22 16:35:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:22,119 INFO L225 Difference]: With dead ends: 347 [2021-12-22 16:35:22,119 INFO L226 Difference]: Without dead ends: 347 [2021-12-22 16:35:22,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2021-12-22 16:35:22,121 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 128 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:22,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 193 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:35:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-22 16:35:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2021-12-22 16:35:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 344 states have (on average 1.0203488372093024) internal successors, (351), 346 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 351 transitions. [2021-12-22 16:35:22,127 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 351 transitions. Word has length 126 [2021-12-22 16:35:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:22,127 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 351 transitions. [2021-12-22 16:35:22,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.929577464788732) internal successors, (350), 71 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 351 transitions. [2021-12-22 16:35:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-22 16:35:22,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:22,129 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:22,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:22,343 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,SelfDestructingSolverStorable14 [2021-12-22 16:35:22,343 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash -79033337, now seen corresponding path program 2 times [2021-12-22 16:35:22,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:22,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975434728] [2021-12-22 16:35:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:22,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2021-12-22 16:35:22,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975434728] [2021-12-22 16:35:22,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975434728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044110780] [2021-12-22 16:35:22,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:22,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:22,508 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) [2021-12-22 16:35:22,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:35:22,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:35:22,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:35:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2513 trivial. 0 not checked. [2021-12-22 16:35:23,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:23,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044110780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:23,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:23,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 16:35:23,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387693620] [2021-12-22 16:35:23,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:23,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:23,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:23,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:23,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:35:23,917 INFO L87 Difference]: Start difference. First operand 347 states and 351 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) [2021-12-22 16:35:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:23,919 INFO L93 Difference]: Finished difference Result 348 states and 351 transitions. [2021-12-22 16:35:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:35:23,919 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 176 [2021-12-22 16:35:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:23,921 INFO L225 Difference]: With dead ends: 348 [2021-12-22 16:35:23,921 INFO L226 Difference]: Without dead ends: 346 [2021-12-22 16:35:23,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:35:23,921 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:23,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-22 16:35:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-22 16:35:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2021-12-22 16:35:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 343 states have (on average 1.0174927113702623) internal successors, (349), 345 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 349 transitions. [2021-12-22 16:35:23,928 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 349 transitions. Word has length 176 [2021-12-22 16:35:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:23,928 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 349 transitions. [2021-12-22 16:35:23,928 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) [2021-12-22 16:35:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 349 transitions. [2021-12-22 16:35:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-22 16:35:23,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:23,930 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:23,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:24,143 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,SelfDestructingSolverStorable15 [2021-12-22 16:35:24,143 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1845056352, now seen corresponding path program 1 times [2021-12-22 16:35:24,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:24,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574245522] [2021-12-22 16:35:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:24,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2514 trivial. 0 not checked. [2021-12-22 16:35:24,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:24,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574245522] [2021-12-22 16:35:24,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574245522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:24,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594533461] [2021-12-22 16:35:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:24,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:24,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:24,232 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) [2021-12-22 16:35:24,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:35:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:24,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 16:35:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2514 trivial. 0 not checked. [2021-12-22 16:35:24,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2021-12-22 16:35:25,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594533461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:25,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:25,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2021-12-22 16:35:25,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406002734] [2021-12-22 16:35:25,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:25,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:35:25,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:35:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:35:25,074 INFO L87 Difference]: Start difference. First operand 346 states and 349 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:25,179 INFO L93 Difference]: Finished difference Result 698 states and 703 transitions. [2021-12-22 16:35:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:35:25,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-12-22 16:35:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:25,184 INFO L225 Difference]: With dead ends: 698 [2021-12-22 16:35:25,185 INFO L226 Difference]: Without dead ends: 698 [2021-12-22 16:35:25,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:25,187 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:25,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 120 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-12-22 16:35:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2021-12-22 16:35:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 691 states have (on average 1.0173661360347324) internal successors, (703), 693 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 703 transitions. [2021-12-22 16:35:25,201 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 703 transitions. Word has length 177 [2021-12-22 16:35:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:25,201 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 703 transitions. [2021-12-22 16:35:25,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 703 transitions. [2021-12-22 16:35:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-12-22 16:35:25,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:25,205 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:25,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-22 16:35:25,427 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,SelfDestructingSolverStorable16 [2021-12-22 16:35:25,427 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1138865693, now seen corresponding path program 1 times [2021-12-22 16:35:25,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:25,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904695369] [2021-12-22 16:35:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:25,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2021-12-22 16:35:25,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904695369] [2021-12-22 16:35:25,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904695369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762597940] [2021-12-22 16:35:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:25,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:25,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:25,691 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) [2021-12-22 16:35:25,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 16:35:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-22 16:35:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:25,915 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:35:25,915 INFO L387 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 [2021-12-22 16:35:25,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:35:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2021-12-22 16:35:28,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2021-12-22 16:35:29,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762597940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:29,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:29,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2021-12-22 16:35:29,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69204147] [2021-12-22 16:35:29,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:29,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:35:29,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:35:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:29,780 INFO L87 Difference]: Start difference. First operand 694 states and 703 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:29,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:29,842 INFO L93 Difference]: Finished difference Result 858 states and 866 transitions. [2021-12-22 16:35:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:35:29,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2021-12-22 16:35:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:29,847 INFO L225 Difference]: With dead ends: 858 [2021-12-22 16:35:29,847 INFO L226 Difference]: Without dead ends: 858 [2021-12-22 16:35:29,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:35:29,848 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:29,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-12-22 16:35:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2021-12-22 16:35:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 855 states have (on average 1.0128654970760234) internal successors, (866), 857 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 866 transitions. [2021-12-22 16:35:29,862 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 866 transitions. Word has length 334 [2021-12-22 16:35:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:29,862 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 866 transitions. [2021-12-22 16:35:29,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 866 transitions. [2021-12-22 16:35:29,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-12-22 16:35:29,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:29,874 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:29,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:30,095 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,SelfDestructingSolverStorable17 [2021-12-22 16:35:30,095 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1652938709, now seen corresponding path program 2 times [2021-12-22 16:35:30,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:30,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285080419] [2021-12-22 16:35:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:30,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 0 proven. 31150 refuted. 0 times theorem prover too weak. 10050 trivial. 0 not checked. [2021-12-22 16:35:30,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:30,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285080419] [2021-12-22 16:35:30,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285080419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012149181] [2021-12-22 16:35:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:30,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:30,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:30,560 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) [2021-12-22 16:35:30,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 16:35:30,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:30,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:30,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:35:30,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 31140 proven. 12 refuted. 0 times theorem prover too weak. 10048 trivial. 0 not checked. [2021-12-22 16:35:33,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:33,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-22 16:35:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 31140 proven. 12 refuted. 0 times theorem prover too weak. 10048 trivial. 0 not checked. [2021-12-22 16:35:36,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012149181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:36,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:36,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2021-12-22 16:35:36,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745460906] [2021-12-22 16:35:36,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:36,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 16:35:36,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:36,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 16:35:36,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:35:36,405 INFO L87 Difference]: Start difference. First operand 858 states and 866 transitions. Second operand has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:36,665 INFO L93 Difference]: Finished difference Result 1036 states and 1043 transitions. [2021-12-22 16:35:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:35:36,666 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 678 [2021-12-22 16:35:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:36,669 INFO L225 Difference]: With dead ends: 1036 [2021-12-22 16:35:36,670 INFO L226 Difference]: Without dead ends: 1036 [2021-12-22 16:35:36,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1342 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:35:36,670 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 294 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:36,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 252 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-12-22 16:35:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 865. [2021-12-22 16:35:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 862 states have (on average 1.0104408352668213) internal successors, (871), 864 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 871 transitions. [2021-12-22 16:35:36,683 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 871 transitions. Word has length 678 [2021-12-22 16:35:36,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:36,684 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 871 transitions. [2021-12-22 16:35:36,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:36,684 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 871 transitions. [2021-12-22 16:35:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2021-12-22 16:35:36,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:36,703 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2021-12-22 16:35:36,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:36,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:36,907 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:36,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1289503496, now seen corresponding path program 2 times [2021-12-22 16:35:36,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:36,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180371255] [2021-12-22 16:35:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:36,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2021-12-22 16:35:37,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:37,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180371255] [2021-12-22 16:35:37,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180371255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:37,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48371054] [2021-12-22 16:35:37,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:37,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:37,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:37,631 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) [2021-12-22 16:35:37,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 16:35:38,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:38,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 16:35:38,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:38,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:35:38,110 INFO L387 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 [2021-12-22 16:35:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2021-12-22 16:35:42,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2021-12-22 16:35:46,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48371054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:46,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:46,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2021-12-22 16:35:46,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771627609] [2021-12-22 16:35:46,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:46,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 16:35:46,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:46,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 16:35:46,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:35:46,280 INFO L87 Difference]: Start difference. First operand 865 states and 871 transitions. Second operand has 18 states, 17 states have (on average 10.411764705882353) internal successors, (177), 18 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:46,605 INFO L93 Difference]: Finished difference Result 1869 states and 1886 transitions. [2021-12-22 16:35:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:35:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 10.411764705882353) internal successors, (177), 18 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 835 [2021-12-22 16:35:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:46,612 INFO L225 Difference]: With dead ends: 1869 [2021-12-22 16:35:46,612 INFO L226 Difference]: Without dead ends: 1869 [2021-12-22 16:35:46,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1659 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-12-22 16:35:46,613 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 51 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:46,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 361 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-12-22 16:35:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1864. [2021-12-22 16:35:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1861 states have (on average 1.0107469102632993) internal successors, (1881), 1863 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 1881 transitions. [2021-12-22 16:35:46,643 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 1881 transitions. Word has length 835 [2021-12-22 16:35:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:46,644 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 1881 transitions. [2021-12-22 16:35:46,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 10.411764705882353) internal successors, (177), 18 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 1881 transitions. [2021-12-22 16:35:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2021-12-22 16:35:46,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:46,650 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-22 16:35:46,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:46,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:46,865 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:46,865 INFO L85 PathProgramCache]: Analyzing trace with hash 980978921, now seen corresponding path program 3 times [2021-12-22 16:35:46,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:46,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256018630] [2021-12-22 16:35:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:46,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64507 backedges. 0 proven. 51915 refuted. 0 times theorem prover too weak. 12592 trivial. 0 not checked. [2021-12-22 16:35:47,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:47,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256018630] [2021-12-22 16:35:47,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256018630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:47,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335222496] [2021-12-22 16:35:47,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:35:47,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:47,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:47,388 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) [2021-12-22 16:35:47,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 16:35:47,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 16:35:47,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 16:35:47,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:47,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:35:47,606 INFO L387 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 [2021-12-22 16:35:47,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:35:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 64507 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 64493 trivial. 0 not checked. [2021-12-22 16:35:51,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:51,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335222496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:51,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:51,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-12-22 16:35:51,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161597494] [2021-12-22 16:35:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:51,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:35:51,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:35:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:35:51,124 INFO L87 Difference]: Start difference. First operand 1864 states and 1881 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2021-12-22 16:35:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:51,190 INFO L93 Difference]: Finished difference Result 1862 states and 1879 transitions. [2021-12-22 16:35:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:35:51,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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 857 [2021-12-22 16:35:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:51,197 INFO L225 Difference]: With dead ends: 1862 [2021-12-22 16:35:51,197 INFO L226 Difference]: Without dead ends: 1862 [2021-12-22 16:35:51,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 865 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:35:51,198 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:51,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 33 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-12-22 16:35:51,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 863. [2021-12-22 16:35:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.0081206496519721) internal successors, (869), 862 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 869 transitions. [2021-12-22 16:35:51,218 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 869 transitions. Word has length 857 [2021-12-22 16:35:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:51,219 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 869 transitions. [2021-12-22 16:35:51,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2021-12-22 16:35:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 869 transitions. [2021-12-22 16:35:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2021-12-22 16:35:51,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:51,225 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:51,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:51,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:51,450 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:51,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash 77125929, now seen corresponding path program 1 times [2021-12-22 16:35:51,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:51,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863297764] [2021-12-22 16:35:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:51,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 51915 refuted. 0 times theorem prover too weak. 12605 trivial. 0 not checked. [2021-12-22 16:35:52,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863297764] [2021-12-22 16:35:52,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863297764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607535875] [2021-12-22 16:35:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:52,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:52,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:52,031 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) [2021-12-22 16:35:52,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 16:35:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:52,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 16:35:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64520 trivial. 0 not checked. [2021-12-22 16:35:58,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:58,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607535875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:58,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:58,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-22 16:35:58,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96282948] [2021-12-22 16:35:58,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:58,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:58,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:58,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:58,630 INFO L87 Difference]: Start difference. First operand 863 states and 869 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:58,633 INFO L93 Difference]: Finished difference Result 862 states and 868 transitions. [2021-12-22 16:35:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:35:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 862 [2021-12-22 16:35:58,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:58,635 INFO L225 Difference]: With dead ends: 862 [2021-12-22 16:35:58,635 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 16:35:58,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:58,637 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:58,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-22 16:35:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 16:35:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 16:35:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 16:35:58,638 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 862 [2021-12-22 16:35:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:58,639 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 16:35:58,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 16:35:58,639 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 16:35:58,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-12-22 16:35:58,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-12-22 16:35:58,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-12-22 16:35:58,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (4 of 8 remaining) [2021-12-22 16:35:58,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (3 of 8 remaining) [2021-12-22 16:35:58,643 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (2 of 8 remaining) [2021-12-22 16:35:58,643 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (1 of 8 remaining) [2021-12-22 16:35:58,643 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-12-22 16:35:58,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:58,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-22 16:35:58,870 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:58,871 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 16:35:58,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:35:58 BoogieIcfgContainer [2021-12-22 16:35:58,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 16:35:58,874 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 16:35:58,874 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 16:35:58,874 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 16:35:58,874 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:10" (3/4) ... [2021-12-22 16:35:58,877 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 16:35:58,884 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-12-22 16:35:58,884 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-22 16:35:58,885 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 16:35:58,885 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 16:35:58,908 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 16:35:58,908 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 16:35:58,909 INFO L158 Benchmark]: Toolchain (without parser) took 48841.73ms. Allocated memory was 75.5MB in the beginning and 541.1MB in the end (delta: 465.6MB). Free memory was 55.4MB in the beginning and 201.3MB in the end (delta: -145.8MB). Peak memory consumption was 319.6MB. Max. memory is 16.1GB. [2021-12-22 16:35:58,909 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory is still 50.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:35:58,909 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.22ms. Allocated memory was 75.5MB in the beginning and 96.5MB in the end (delta: 21.0MB). Free memory was 55.3MB in the beginning and 69.9MB in the end (delta: -14.6MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-12-22 16:35:58,909 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.91ms. Allocated memory is still 96.5MB. Free memory was 69.9MB in the beginning and 68.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 16:35:58,910 INFO L158 Benchmark]: Boogie Preprocessor took 25.32ms. Allocated memory is still 96.5MB. Free memory was 68.3MB in the beginning and 67.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:35:58,910 INFO L158 Benchmark]: RCFGBuilder took 236.99ms. Allocated memory is still 96.5MB. Free memory was 67.0MB in the beginning and 56.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 16:35:58,910 INFO L158 Benchmark]: TraceAbstraction took 48280.94ms. Allocated memory was 96.5MB in the beginning and 541.1MB in the end (delta: 444.6MB). Free memory was 55.8MB in the beginning and 203.4MB in the end (delta: -147.6MB). Peak memory consumption was 298.6MB. Max. memory is 16.1GB. [2021-12-22 16:35:58,911 INFO L158 Benchmark]: Witness Printer took 34.43ms. Allocated memory is still 541.1MB. Free memory was 203.4MB in the beginning and 201.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 16:35:58,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory is still 50.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.22ms. Allocated memory was 75.5MB in the beginning and 96.5MB in the end (delta: 21.0MB). Free memory was 55.3MB in the beginning and 69.9MB in the end (delta: -14.6MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.91ms. Allocated memory is still 96.5MB. Free memory was 69.9MB in the beginning and 68.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.32ms. Allocated memory is still 96.5MB. Free memory was 68.3MB in the beginning and 67.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 236.99ms. Allocated memory is still 96.5MB. Free memory was 67.0MB in the beginning and 56.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 48280.94ms. Allocated memory was 96.5MB in the beginning and 541.1MB in the end (delta: 444.6MB). Free memory was 55.8MB in the beginning and 203.4MB in the end (delta: -147.6MB). Peak memory consumption was 298.6MB. Max. memory is 16.1GB. * Witness Printer took 34.43ms. Allocated memory is still 541.1MB. Free memory was 203.4MB in the beginning and 201.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 48.2s, OverallIterations: 22, TraceHistogramMax: 160, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2097 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2097 mSDsluCounter, 1966 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 21 IncrementalHoareTripleChecker+Unchecked, 1429 mSDsCounter, 289 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1705 IncrementalHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 289 mSolverCounterUnsat, 537 mSDtfsCounter, 1705 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6761 GetRequests, 6438 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1864occurred in iteration=20, InterpolantAutomatonStates: 204, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 1432 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 37.1s InterpolantComputationTime, 8610 NumberOfCodeBlocks, 7533 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 10859 ConstructedInterpolants, 1034 QuantifiedInterpolants, 126032 SizeOfPredicates, 43 NumberOfNonLiveVariables, 9845 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 49 InterpolantComputations, 11 PerfectInterpolantSequences, 312583/623306 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 16:35:58,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE