./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/ArraysOfVariableLength.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 eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:54:47,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:54:47,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:54:47,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:54:47,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:54:47,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:54:47,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:54:47,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:54:47,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:54:47,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:54:47,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:54:47,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:54:47,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:54:47,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:54:47,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:54:47,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:54:47,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:54:47,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:54:47,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:54:47,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:54:47,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:54:47,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:54:47,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:54:47,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:54:47,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:54:47,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:54:47,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:54:47,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:54:47,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:54:47,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:54:47,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:54:47,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:54:47,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:54:47,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:54:47,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:54:47,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:54:47,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:54:47,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:54:47,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:54:47,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:54:47,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:54:47,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:54:47,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:54:47,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:54:47,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:54:47,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:54:47,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:54:47,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:54:47,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:54:47,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:54:47,272 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:54:47,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:54:47,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:54:47,273 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:54:47,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:54:47,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:54:47,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:54:47,273 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:54:47,273 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:54:47,274 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:54:47,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:54:47,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:54:47,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:54:47,274 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:54:47,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:54:47,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:54:47,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:54:47,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:54:47,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:54:47,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:54:47,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:54:47,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:54:47,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:54:47,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 [2021-12-16 05:54:47,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:54:47,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:54:47,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:54:47,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:54:47,525 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:54:47,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-12-16 05:54:47,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a234773/5eeaaa1334a045cfba20a10ba55b45b7/FLAG96c5ad805 [2021-12-16 05:54:47,941 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:54:47,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-12-16 05:54:47,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a234773/5eeaaa1334a045cfba20a10ba55b45b7/FLAG96c5ad805 [2021-12-16 05:54:47,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a234773/5eeaaa1334a045cfba20a10ba55b45b7 [2021-12-16 05:54:47,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:54:47,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:54:47,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:54:47,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:54:47,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:54:47,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:47" (1/1) ... [2021-12-16 05:54:47,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a518fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:47, skipping insertion in model container [2021-12-16 05:54:47,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:47" (1/1) ... [2021-12-16 05:54:47,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:54:47,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:54:48,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:54:48,119 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:54:48,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:54:48,141 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:54:48,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48 WrapperNode [2021-12-16 05:54:48,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:54:48,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:54:48,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:54:48,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:54:48,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,172 INFO L137 Inliner]: procedures = 8, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2021-12-16 05:54:48,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:54:48,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:54:48,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:54:48,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:54:48,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:54:48,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:54:48,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:54:48,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:54:48,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (1/1) ... [2021-12-16 05:54:48,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:54:48,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:48,232 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) [2021-12-16 05:54:48,251 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 [2021-12-16 05:54:48,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:54:48,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:54:48,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:54:48,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:54:48,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:54:48,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:54:48,315 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:54:48,316 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:54:48,422 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:54:48,426 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:54:48,427 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 05:54:48,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:54:48 BoogieIcfgContainer [2021-12-16 05:54:48,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:54:48,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:54:48,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:54:48,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:54:48,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:54:47" (1/3) ... [2021-12-16 05:54:48,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c15ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:54:48, skipping insertion in model container [2021-12-16 05:54:48,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:48" (2/3) ... [2021-12-16 05:54:48,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c15ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:54:48, skipping insertion in model container [2021-12-16 05:54:48,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:54:48" (3/3) ... [2021-12-16 05:54:48,433 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2021-12-16 05:54:48,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:54:48,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-16 05:54:48,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:54:48,468 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 [2021-12-16 05:54:48,469 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-16 05:54:48,477 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) [2021-12-16 05:54:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 05:54:48,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:48,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 05:54:48,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:48,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:48,494 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-12-16 05:54:48,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:48,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039665375] [2021-12-16 05:54:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:48,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:48,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:48,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039665375] [2021-12-16 05:54:48,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039665375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:48,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:48,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:54:48,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283319425] [2021-12-16 05:54:48,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:48,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:48,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:48,734 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2021-12-16 05:54:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:48,823 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-12-16 05:54:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:54:48,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2021-12-16 05:54:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:48,829 INFO L225 Difference]: With dead ends: 76 [2021-12-16 05:54:48,830 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 05:54:48,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:54:48,833 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:48,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 61 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 05:54:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 32. [2021-12-16 05:54:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 31 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) [2021-12-16 05:54:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-16 05:54:48,854 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 5 [2021-12-16 05:54:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:48,855 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-16 05:54:48,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2021-12-16 05:54:48,855 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-16 05:54:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:54:48,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:48,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:48,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:54:48,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:48,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-12-16 05:54:48,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:48,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345207584] [2021-12-16 05:54:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:48,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:48,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:48,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345207584] [2021-12-16 05:54:48,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345207584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:48,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:48,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:54:48,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638914663] [2021-12-16 05:54:48,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:48,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:54:48,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:48,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:54:48,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:48,897 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:48,916 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-16 05:54:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:54:48,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:54:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:48,917 INFO L225 Difference]: With dead ends: 30 [2021-12-16 05:54:48,917 INFO L226 Difference]: Without dead ends: 30 [2021-12-16 05:54:48,918 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 [2021-12-16 05:54:48,920 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:48,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-16 05:54:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-16 05:54:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.375) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-16 05:54:48,927 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 7 [2021-12-16 05:54:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:48,928 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-16 05:54:48,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:48,929 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-16 05:54:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:54:48,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:48,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:48,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:54:48,930 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810360, now seen corresponding path program 1 times [2021-12-16 05:54:48,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:48,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288624277] [2021-12-16 05:54:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:48,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:48,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:48,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288624277] [2021-12-16 05:54:48,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288624277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:48,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:48,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:54:48,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151215523] [2021-12-16 05:54:48,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:48,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:54:48,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:54:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:48,973 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:49,002 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-16 05:54:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:54:49,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:54:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:49,004 INFO L225 Difference]: With dead ends: 35 [2021-12-16 05:54:49,004 INFO L226 Difference]: Without dead ends: 35 [2021-12-16 05:54:49,005 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 [2021-12-16 05:54:49,006 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:49,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-16 05:54:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-16 05:54:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3333333333333333) 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) [2021-12-16 05:54:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-16 05:54:49,015 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2021-12-16 05:54:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:49,015 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-16 05:54:49,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-16 05:54:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:54:49,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:49,016 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:49,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 05:54:49,017 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash -352773613, now seen corresponding path program 1 times [2021-12-16 05:54:49,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:49,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018386853] [2021-12-16 05:54:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:49,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:49,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018386853] [2021-12-16 05:54:49,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018386853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22572071] [2021-12-16 05:54:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:49,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:49,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:49,083 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) [2021-12-16 05:54:49,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:54:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:49,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:54:49,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:49,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:49,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22572071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:49,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:49,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2021-12-16 05:54:49,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050920320] [2021-12-16 05:54:49,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:49,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:54:49,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:54:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:54:49,323 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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) [2021-12-16 05:54:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:49,432 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-12-16 05:54:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:54:49,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 05:54:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:49,435 INFO L225 Difference]: With dead ends: 49 [2021-12-16 05:54:49,435 INFO L226 Difference]: Without dead ends: 49 [2021-12-16 05:54:49,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:54:49,442 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:49,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 60 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-16 05:54:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-12-16 05:54:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-16 05:54:49,451 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 12 [2021-12-16 05:54:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:49,452 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-16 05:54:49,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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) [2021-12-16 05:54:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-16 05:54:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:54:49,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:49,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:49,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:49,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:49,670 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:49,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1948884381, now seen corresponding path program 1 times [2021-12-16 05:54:49,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:49,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870437145] [2021-12-16 05:54:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:49,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:49,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:49,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870437145] [2021-12-16 05:54:49,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870437145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785277048] [2021-12-16 05:54:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:49,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:49,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:49,728 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) [2021-12-16 05:54:49,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:54:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:54:49,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:49,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:49,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785277048] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:49,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:49,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 05:54:49,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321125749] [2021-12-16 05:54:49,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:49,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:54:49,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:54:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:54:49,816 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:49,857 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-12-16 05:54:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:54:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 05:54:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:49,858 INFO L225 Difference]: With dead ends: 98 [2021-12-16 05:54:49,858 INFO L226 Difference]: Without dead ends: 98 [2021-12-16 05:54:49,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:54:49,859 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 167 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:49,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 65 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-16 05:54:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2021-12-16 05:54:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 75 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-12-16 05:54:49,863 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 13 [2021-12-16 05:54:49,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:49,863 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-12-16 05:54:49,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-12-16 05:54:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:54:49,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:49,864 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:49,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:50,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:50,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:50,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1948919938, now seen corresponding path program 1 times [2021-12-16 05:54:50,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:50,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524388143] [2021-12-16 05:54:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:50,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:50,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:50,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524388143] [2021-12-16 05:54:50,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524388143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:50,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:50,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:54:50,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934253670] [2021-12-16 05:54:50,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:50,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:50,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:50,112 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:50,131 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2021-12-16 05:54:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:54:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 05:54:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:50,135 INFO L225 Difference]: With dead ends: 75 [2021-12-16 05:54:50,136 INFO L226 Difference]: Without dead ends: 75 [2021-12-16 05:54:50,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:54:50,137 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:50,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-16 05:54:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-16 05:54:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2021-12-16 05:54:50,151 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 13 [2021-12-16 05:54:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:50,152 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2021-12-16 05:54:50,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2021-12-16 05:54:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:54:50,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:50,153 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:50,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 05:54:50,153 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:50,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1948919939, now seen corresponding path program 1 times [2021-12-16 05:54:50,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:50,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064235138] [2021-12-16 05:54:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:50,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:54:50,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064235138] [2021-12-16 05:54:50,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064235138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770138731] [2021-12-16 05:54:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:50,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:50,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:50,228 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) [2021-12-16 05:54:50,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:54:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:50,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 05:54:50,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:54:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:54:50,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:54:50,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770138731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:50,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:50,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-16 05:54:50,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362703811] [2021-12-16 05:54:50,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:50,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:54:50,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:50,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:54:50,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:54:50,443 INFO L87 Difference]: Start difference. First operand 75 states and 92 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) [2021-12-16 05:54:50,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:50,509 INFO L93 Difference]: Finished difference Result 136 states and 168 transitions. [2021-12-16 05:54:50,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:54:50,509 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 13 [2021-12-16 05:54:50,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:50,510 INFO L225 Difference]: With dead ends: 136 [2021-12-16 05:54:50,510 INFO L226 Difference]: Without dead ends: 136 [2021-12-16 05:54:50,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:54:50,512 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:50,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 41 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-16 05:54:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2021-12-16 05:54:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.3181818181818181) internal successors, (116), 92 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2021-12-16 05:54:50,529 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 13 [2021-12-16 05:54:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:50,530 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2021-12-16 05:54:50,530 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) [2021-12-16 05:54:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2021-12-16 05:54:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:54:50,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:50,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:50,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 05:54:50,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:50,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1980019516, now seen corresponding path program 1 times [2021-12-16 05:54:50,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:50,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727875627] [2021-12-16 05:54:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:50,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:50,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727875627] [2021-12-16 05:54:50,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727875627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167303956] [2021-12-16 05:54:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:50,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:50,785 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) [2021-12-16 05:54:50,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:54:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:50,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:54:50,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:50,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:50,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167303956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:50,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:50,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-16 05:54:50,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898255249] [2021-12-16 05:54:50,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:50,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:54:50,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:54:50,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:54:50,927 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:51,034 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2021-12-16 05:54:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:54:51,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 05:54:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:51,035 INFO L225 Difference]: With dead ends: 95 [2021-12-16 05:54:51,035 INFO L226 Difference]: Without dead ends: 95 [2021-12-16 05:54:51,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:54:51,036 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:51,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 67 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-16 05:54:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2021-12-16 05:54:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-12-16 05:54:51,038 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 17 [2021-12-16 05:54:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:51,039 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-12-16 05:54:51,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-12-16 05:54:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 05:54:51,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:51,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:51,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 05:54:51,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:51,255 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:51,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:51,256 INFO L85 PathProgramCache]: Analyzing trace with hash -128290732, now seen corresponding path program 1 times [2021-12-16 05:54:51,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:51,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433957516] [2021-12-16 05:54:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:51,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:54:51,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:51,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433957516] [2021-12-16 05:54:51,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433957516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:51,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071377169] [2021-12-16 05:54:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:51,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:51,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:51,308 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) [2021-12-16 05:54:51,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:54:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:51,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:54:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:51,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:54:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:54:51,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:54:51,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071377169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:51,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:51,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-16 05:54:51,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616709839] [2021-12-16 05:54:51,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:51,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 05:54:51,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 05:54:51,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:54:51,533 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 9 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) [2021-12-16 05:54:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:51,621 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2021-12-16 05:54:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:54:51,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 9 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) Word has length 19 [2021-12-16 05:54:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:51,622 INFO L225 Difference]: With dead ends: 89 [2021-12-16 05:54:51,622 INFO L226 Difference]: Without dead ends: 89 [2021-12-16 05:54:51,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:54:51,623 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:51,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 66 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:51,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-16 05:54:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-12-16 05:54:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 83 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-12-16 05:54:51,626 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 19 [2021-12-16 05:54:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:51,626 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-12-16 05:54:51,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 9 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) [2021-12-16 05:54:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-12-16 05:54:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 05:54:51,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:51,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-16 05:54:51,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:51,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:51,840 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash -702798240, now seen corresponding path program 2 times [2021-12-16 05:54:51,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:51,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766523323] [2021-12-16 05:54:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:51,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:54:51,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:51,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766523323] [2021-12-16 05:54:51,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766523323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:51,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054599528] [2021-12-16 05:54:51,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:54:51,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:51,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:51,909 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) [2021-12-16 05:54:51,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:54:51,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:54:51,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:54:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:54:51,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 05:54:52,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 05:54:52,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054599528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:52,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:52,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 12 [2021-12-16 05:54:52,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500019612] [2021-12-16 05:54:52,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:52,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:54:52,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:52,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:54:52,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:54:52,135 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 13 states, 12 states have (on average 4.75) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:52,321 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-12-16 05:54:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:54:52,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.75) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 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 29 [2021-12-16 05:54:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:52,322 INFO L225 Difference]: With dead ends: 93 [2021-12-16 05:54:52,322 INFO L226 Difference]: Without dead ends: 93 [2021-12-16 05:54:52,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:54:52,322 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 106 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:52,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 87 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-16 05:54:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2021-12-16 05:54:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.123456790123457) internal successors, (91), 82 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-12-16 05:54:52,324 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 29 [2021-12-16 05:54:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:52,325 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-12-16 05:54:52,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.75) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-12-16 05:54:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 05:54:52,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:52,325 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-16 05:54:52,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:52,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:52,539 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash 777529983, now seen corresponding path program 1 times [2021-12-16 05:54:52,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:52,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125684838] [2021-12-16 05:54:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:52,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 05:54:52,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:52,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125684838] [2021-12-16 05:54:52,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125684838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391268572] [2021-12-16 05:54:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:52,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:52,643 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) [2021-12-16 05:54:52,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:54:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:52,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:54:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:54:52,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:54:52,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391268572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:52,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:52,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2021-12-16 05:54:52,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878751589] [2021-12-16 05:54:52,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:52,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:54:52,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:52,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:54:52,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:54:52,877 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:53,167 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2021-12-16 05:54:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:54:53,167 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-16 05:54:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:53,168 INFO L225 Difference]: With dead ends: 90 [2021-12-16 05:54:53,168 INFO L226 Difference]: Without dead ends: 90 [2021-12-16 05:54:53,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2021-12-16 05:54:53,169 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 174 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:53,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 122 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-16 05:54:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2021-12-16 05:54:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2021-12-16 05:54:53,171 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 35 [2021-12-16 05:54:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:53,171 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2021-12-16 05:54:53,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2021-12-16 05:54:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:54:53,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:53,172 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-16 05:54:53,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:53,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:53,383 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1258264466, now seen corresponding path program 2 times [2021-12-16 05:54:53,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:53,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109469673] [2021-12-16 05:54:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:53,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 05:54:53,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109469673] [2021-12-16 05:54:53,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109469673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453577547] [2021-12-16 05:54:53,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:54:53,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:53,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:53,467 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) [2021-12-16 05:54:53,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 05:54:53,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:54:53,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:54:53,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 05:54:53,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:53,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:54:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-16 05:54:53,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-16 05:54:54,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453577547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:54,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:54,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2021-12-16 05:54:54,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664648467] [2021-12-16 05:54:54,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:54,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 05:54:54,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:54,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 05:54:54,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:54:54,061 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:54,216 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2021-12-16 05:54:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:54:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-16 05:54:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:54,217 INFO L225 Difference]: With dead ends: 144 [2021-12-16 05:54:54,217 INFO L226 Difference]: Without dead ends: 144 [2021-12-16 05:54:54,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:54:54,218 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 256 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:54,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 80 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-16 05:54:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 78. [2021-12-16 05:54:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 77 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-12-16 05:54:54,220 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 52 [2021-12-16 05:54:54,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:54,220 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-12-16 05:54:54,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,220 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-12-16 05:54:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 05:54:54,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:54,221 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:54,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:54,431 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,SelfDestructingSolverStorable11 [2021-12-16 05:54:54,432 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash 139155595, now seen corresponding path program 1 times [2021-12-16 05:54:54,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:54,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920642041] [2021-12-16 05:54:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:54,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:54:54,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920642041] [2021-12-16 05:54:54,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920642041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880339395] [2021-12-16 05:54:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:54,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:54,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:54,491 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) [2021-12-16 05:54:54,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 05:54:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:54,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 05:54:54,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 59 proven. 49 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 05:54:54,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 59 proven. 49 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 05:54:54,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880339395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:54,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:54,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 17 [2021-12-16 05:54:54,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555818709] [2021-12-16 05:54:54,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:54,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:54:54,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:54,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:54:54,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:54:54,798 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 17 states, 17 states have (on average 6.705882352941177) internal successors, (114), 17 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:55,082 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2021-12-16 05:54:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 05:54:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.705882352941177) internal successors, (114), 17 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-16 05:54:55,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:55,083 INFO L225 Difference]: With dead ends: 160 [2021-12-16 05:54:55,083 INFO L226 Difference]: Without dead ends: 160 [2021-12-16 05:54:55,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 05:54:55,084 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 413 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:55,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 125 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-16 05:54:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 109. [2021-12-16 05:54:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0833333333333333) internal successors, (117), 108 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2021-12-16 05:54:55,086 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 62 [2021-12-16 05:54:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:55,087 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2021-12-16 05:54:55,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.705882352941177) internal successors, (114), 17 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2021-12-16 05:54:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 05:54:55,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:55,088 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:55,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:55,295 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,SelfDestructingSolverStorable12 [2021-12-16 05:54:55,295 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1505920576, now seen corresponding path program 2 times [2021-12-16 05:54:55,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:55,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201691201] [2021-12-16 05:54:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:55,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-16 05:54:55,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201691201] [2021-12-16 05:54:55,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201691201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:55,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248295956] [2021-12-16 05:54:55,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:54:55,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:55,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:55,369 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) [2021-12-16 05:54:55,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 05:54:55,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:54:55,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:54:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:54:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-16 05:54:55,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:55,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248295956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:55,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:54:55,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-16 05:54:55,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899314248] [2021-12-16 05:54:55,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:55,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:55,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:54:55,771 INFO L87 Difference]: Start difference. First operand 109 states and 117 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) [2021-12-16 05:54:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:55,772 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-12-16 05:54:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:54:55,772 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 89 [2021-12-16 05:54:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:55,773 INFO L225 Difference]: With dead ends: 110 [2021-12-16 05:54:55,773 INFO L226 Difference]: Without dead ends: 108 [2021-12-16 05:54:55,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:54:55,774 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, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:55,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2021-12-16 05:54:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-16 05:54:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-16 05:54:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 107 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2021-12-16 05:54:55,776 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 89 [2021-12-16 05:54:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:55,776 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2021-12-16 05:54:55,776 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) [2021-12-16 05:54:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2021-12-16 05:54:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-16 05:54:55,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:55,777 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:55,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:55,991 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,SelfDestructingSolverStorable13 [2021-12-16 05:54:55,991 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:55,992 INFO L85 PathProgramCache]: Analyzing trace with hash -315841054, now seen corresponding path program 1 times [2021-12-16 05:54:55,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:55,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038904852] [2021-12-16 05:54:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:55,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-16 05:54:56,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:56,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038904852] [2021-12-16 05:54:56,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038904852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108551668] [2021-12-16 05:54:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:56,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:56,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:56,063 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) [2021-12-16 05:54:56,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 05:54:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:54:56,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 144 proven. 130 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 05:54:56,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 144 proven. 130 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 05:54:56,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108551668] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:56,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:56,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 21 [2021-12-16 05:54:56,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254197959] [2021-12-16 05:54:56,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:56,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 05:54:56,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:56,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 05:54:56,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:54:56,555 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 21 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:57,003 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2021-12-16 05:54:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 05:54:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 21 states have internal predecessors, (129), 0 states have call successors, (0), 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 107 [2021-12-16 05:54:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:57,004 INFO L225 Difference]: With dead ends: 185 [2021-12-16 05:54:57,004 INFO L226 Difference]: Without dead ends: 185 [2021-12-16 05:54:57,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=1683, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 05:54:57,005 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 403 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:57,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 162 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:54:57,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-16 05:54:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 144. [2021-12-16 05:54:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2021-12-16 05:54:57,008 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 107 [2021-12-16 05:54:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:57,008 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2021-12-16 05:54:57,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 21 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2021-12-16 05:54:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-16 05:54:57,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:57,009 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:57,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:57,215 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,SelfDestructingSolverStorable14 [2021-12-16 05:54:57,215 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:54:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash 682089947, now seen corresponding path program 2 times [2021-12-16 05:54:57,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:57,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307385266] [2021-12-16 05:54:57,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:57,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-12-16 05:54:57,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:57,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307385266] [2021-12-16 05:54:57,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307385266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:57,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308173224] [2021-12-16 05:54:57,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:54:57,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:57,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:57,285 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) [2021-12-16 05:54:57,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 05:54:57,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:54:57,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:54:57,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:54:57,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-12-16 05:54:57,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:57,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308173224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:57,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:54:57,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2021-12-16 05:54:57,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044263298] [2021-12-16 05:54:57,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:57,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:57,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:54:57,782 INFO L87 Difference]: Start difference. First operand 144 states and 148 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) [2021-12-16 05:54:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:57,783 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2021-12-16 05:54:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:54:57,783 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 143 [2021-12-16 05:54:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:57,784 INFO L225 Difference]: With dead ends: 143 [2021-12-16 05:54:57,784 INFO L226 Difference]: Without dead ends: 0 [2021-12-16 05:54:57,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:54:57,784 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 [2021-12-16 05:54:57,785 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] [2021-12-16 05:54:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-16 05:54:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-16 05:54:57,785 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) [2021-12-16 05:54:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-16 05:54:57,785 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2021-12-16 05:54:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:57,786 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 05:54:57,786 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) [2021-12-16 05:54:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-16 05:54:57,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-16 05:54:57,788 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-12-16 05:54:57,788 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-12-16 05:54:57,788 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-12-16 05:54:57,788 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (4 of 8 remaining) [2021-12-16 05:54:57,788 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (3 of 8 remaining) [2021-12-16 05:54:57,789 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (2 of 8 remaining) [2021-12-16 05:54:57,789 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (1 of 8 remaining) [2021-12-16 05:54:57,789 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-12-16 05:54:57,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:58,002 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,SelfDestructingSolverStorable15 [2021-12-16 05:54:58,004 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:58,005 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 05:54:58,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:54:58 BoogieIcfgContainer [2021-12-16 05:54:58,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 05:54:58,008 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 05:54:58,008 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 05:54:58,008 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 05:54:58,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:54:48" (3/4) ... [2021-12-16 05:54:58,010 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-16 05:54:58,016 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-12-16 05:54:58,016 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-16 05:54:58,016 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-16 05:54:58,016 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-16 05:54:58,035 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-16 05:54:58,035 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 05:54:58,036 INFO L158 Benchmark]: Toolchain (without parser) took 10066.64ms. Allocated memory was 83.9MB in the beginning and 146.8MB in the end (delta: 62.9MB). Free memory was 45.5MB in the beginning and 105.6MB in the end (delta: -60.0MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-12-16 05:54:58,036 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory was 62.1MB in the beginning and 62.0MB in the end (delta: 44.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:54:58,036 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.16ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 45.3MB in the beginning and 77.6MB in the end (delta: -32.2MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. [2021-12-16 05:54:58,036 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.52ms. Allocated memory is still 100.7MB. Free memory was 77.6MB in the beginning and 75.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 05:54:58,037 INFO L158 Benchmark]: Boogie Preprocessor took 34.72ms. Allocated memory is still 100.7MB. Free memory was 75.9MB in the beginning and 75.1MB in the end (delta: 808.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:54:58,037 INFO L158 Benchmark]: RCFGBuilder took 219.79ms. Allocated memory is still 100.7MB. Free memory was 75.0MB in the beginning and 64.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 05:54:58,037 INFO L158 Benchmark]: TraceAbstraction took 9578.35ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 63.7MB in the beginning and 108.5MB in the end (delta: -44.7MB). Peak memory consumption was 848.5kB. Max. memory is 16.1GB. [2021-12-16 05:54:58,037 INFO L158 Benchmark]: Witness Printer took 27.60ms. Allocated memory is still 146.8MB. Free memory was 108.5MB in the beginning and 105.6MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 05:54:58,038 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory was 62.1MB in the beginning and 62.0MB in the end (delta: 44.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 170.16ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 45.3MB in the beginning and 77.6MB in the end (delta: -32.2MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.52ms. Allocated memory is still 100.7MB. Free memory was 77.6MB in the beginning and 75.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.72ms. Allocated memory is still 100.7MB. Free memory was 75.9MB in the beginning and 75.1MB in the end (delta: 808.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 219.79ms. Allocated memory is still 100.7MB. Free memory was 75.0MB in the beginning and 64.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9578.35ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 63.7MB in the beginning and 108.5MB in the end (delta: -44.7MB). Peak memory consumption was 848.5kB. Max. memory is 16.1GB. * Witness Printer took 27.60ms. Allocated memory is still 146.8MB. Free memory was 108.5MB in the beginning and 105.6MB in the end (delta: 2.9MB). 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: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: 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: 9.5s, OverallIterations: 16, TraceHistogramMax: 14, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1965 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1965 mSDsluCounter, 1083 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19 IncrementalHoareTripleChecker+Unchecked, 775 mSDsCounter, 352 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1956 IncrementalHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 352 mSolverCounterUnsat, 308 mSDtfsCounter, 1956 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1111 GetRequests, 891 SyntacticMatches, 5 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=15, InterpolantAutomatonStates: 152, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 308 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 1214 NumberOfCodeBlocks, 952 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1535 ConstructedInterpolants, 228 QuantifiedInterpolants, 9351 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1521 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 38 InterpolantComputations, 6 PerfectInterpolantSequences, 2845/3984 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! [2021-12-16 05:54:58,070 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