./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/eureka_05.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:47:41,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:47:41,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:47:41,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:47:41,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:47:41,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:47:41,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:47:41,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:47:41,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:47:41,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:47:41,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:47:41,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:47:41,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:47:41,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:47:41,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:47:41,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:47:41,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:47:41,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:47:41,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:47:41,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:47:41,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:47:41,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:47:41,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:47:41,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:47:41,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:47:41,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:47:41,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:47:41,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:47:41,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:47:41,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:47:41,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:47:41,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:47:41,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:47:41,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:47:41,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:47:41,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:47:41,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:47:41,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:47:41,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:47:41,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:47:41,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:47:41,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:47:41,362 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:47:41,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:47:41,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:47:41,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:47:41,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:47:41,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:47:41,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:47:41,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:47:41,365 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:47:41,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:47:41,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:47:41,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:47:41,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:47:41,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:47:41,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:47:41,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:47:41,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:47:41,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:47:41,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:47:41,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:47:41,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:47:41,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:47:41,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:47:41,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:47:41,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:47:41,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:47:41,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:47:41,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:47:41,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:47:41,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:47:41,369 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:47:41,369 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:47:41,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:47:41,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:47:41,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab [2021-12-15 10:47:41,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:47:41,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:47:41,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:47:41,579 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:47:41,579 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:47:41,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_05.i [2021-12-15 10:47:41,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e854b9e10/b816d4b68ee34e3cb075604bcf36e418/FLAG1522ca20a [2021-12-15 10:47:42,012 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:47:42,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_05.i [2021-12-15 10:47:42,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e854b9e10/b816d4b68ee34e3cb075604bcf36e418/FLAG1522ca20a [2021-12-15 10:47:42,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e854b9e10/b816d4b68ee34e3cb075604bcf36e418 [2021-12-15 10:47:42,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:47:42,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:47:42,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:47:42,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:47:42,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:47:42,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd6379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42, skipping insertion in model container [2021-12-15 10:47:42,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:47:42,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:47:42,193 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_05.i[810,823] [2021-12-15 10:47:42,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:47:42,212 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:47:42,223 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_05.i[810,823] [2021-12-15 10:47:42,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:47:42,244 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:47:42,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42 WrapperNode [2021-12-15 10:47:42,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:47:42,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:47:42,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:47:42,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:47:42,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,271 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2021-12-15 10:47:42,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:47:42,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:47:42,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:47:42,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:47:42,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:47:42,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:47:42,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:47:42,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:47:42,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (1/1) ... [2021-12-15 10:47:42,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:47:42,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:42,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 10:47:42,336 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 [2021-12-15 10:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 10:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 10:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:47:42,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 10:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 10:47:42,400 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:47:42,401 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:47:42,506 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:47:42,510 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:47:42,510 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 10:47:42,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:47:42 BoogieIcfgContainer [2021-12-15 10:47:42,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:47:42,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:47:42,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:47:42,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:47:42,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:47:42" (1/3) ... [2021-12-15 10:47:42,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@213b57c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:47:42, skipping insertion in model container [2021-12-15 10:47:42,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:42" (2/3) ... [2021-12-15 10:47:42,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@213b57c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:47:42, skipping insertion in model container [2021-12-15 10:47:42,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:47:42" (3/3) ... [2021-12-15 10:47:42,517 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2021-12-15 10:47:42,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:47:42,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:47:42,554 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:47:42,572 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:47:42,573 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:47:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 10:47:42,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:42,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:42,587 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2015864939, now seen corresponding path program 1 times [2021-12-15 10:47:42,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:42,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945339456] [2021-12-15 10:47:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:42,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:42,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:42,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945339456] [2021-12-15 10:47:42,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945339456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:47:42,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:47:42,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:47:42,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616634527] [2021-12-15 10:47:42,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:47:42,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:47:42,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:42,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:47:42,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:47:42,788 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:42,819 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-12-15 10:47:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:47:42,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-15 10:47:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:42,831 INFO L225 Difference]: With dead ends: 42 [2021-12-15 10:47:42,831 INFO L226 Difference]: Without dead ends: 20 [2021-12-15 10:47:42,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:47:42,834 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:42,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 39 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-15 10:47:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-12-15 10:47:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-12-15 10:47:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-15 10:47:42,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-15 10:47:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:42,875 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-15 10:47:42,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-15 10:47:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 10:47:42,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:42,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:42,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:47:42,876 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:42,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1565230291, now seen corresponding path program 1 times [2021-12-15 10:47:42,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:42,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394180871] [2021-12-15 10:47:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:42,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:42,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:42,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394180871] [2021-12-15 10:47:42,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394180871] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077648248] [2021-12-15 10:47:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:42,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:42,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:42,927 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) [2021-12-15 10:47:42,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:47:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 10:47:42,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:43,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:43,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077648248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:43,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:43,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-15 10:47:43,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461566748] [2021-12-15 10:47:43,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:43,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 10:47:43,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:43,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 10:47:43,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:47:43,104 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:43,129 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-12-15 10:47:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:47:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 10:47:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:43,130 INFO L225 Difference]: With dead ends: 45 [2021-12-15 10:47:43,131 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 10:47:43,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:47:43,132 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:43,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 56 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 10:47:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-12-15 10:47:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-15 10:47:43,144 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-12-15 10:47:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:43,144 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-15 10:47:43,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-15 10:47:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 10:47:43,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:43,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:43,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:43,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:43,362 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:43,363 INFO L85 PathProgramCache]: Analyzing trace with hash -7962739, now seen corresponding path program 2 times [2021-12-15 10:47:43,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:43,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500667210] [2021-12-15 10:47:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:43,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 10:47:43,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:43,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500667210] [2021-12-15 10:47:43,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500667210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:47:43,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:47:43,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:47:43,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183176290] [2021-12-15 10:47:43,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:47:43,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:47:43,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:43,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:47:43,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:47:43,454 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:43,475 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-12-15 10:47:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:47:43,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 10:47:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:43,476 INFO L225 Difference]: With dead ends: 38 [2021-12-15 10:47:43,476 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 10:47:43,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:47:43,477 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 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 [2021-12-15 10:47:43,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:43,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 10:47:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-15 10:47:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2021-12-15 10:47:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-15 10:47:43,481 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-15 10:47:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:43,481 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-15 10:47:43,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-15 10:47:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 10:47:43,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:43,482 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:43,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:47:43,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1148715813, now seen corresponding path program 1 times [2021-12-15 10:47:43,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:43,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720269188] [2021-12-15 10:47:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:43,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 10:47:43,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:43,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720269188] [2021-12-15 10:47:43,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720269188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:47:43,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:47:43,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:47:43,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303792405] [2021-12-15 10:47:43,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:47:43,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:47:43,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:43,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:47:43,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:47:43,550 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:43,591 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-12-15 10:47:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 10:47:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 10:47:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:43,593 INFO L225 Difference]: With dead ends: 47 [2021-12-15 10:47:43,594 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 10:47:43,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:47:43,595 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:43,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 10:47:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-12-15 10:47:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-15 10:47:43,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-12-15 10:47:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:43,603 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-15 10:47:43,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-15 10:47:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 10:47:43,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:43,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:43,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:47:43,604 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1025080129, now seen corresponding path program 1 times [2021-12-15 10:47:43,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:43,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969083780] [2021-12-15 10:47:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:43,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 10:47:43,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:43,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969083780] [2021-12-15 10:47:43,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969083780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:43,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925861452] [2021-12-15 10:47:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:43,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:43,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:43,670 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) [2021-12-15 10:47:43,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 10:47:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:47:43,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:47:43,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:47:43,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925861452] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:43,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:43,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2021-12-15 10:47:43,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126855588] [2021-12-15 10:47:43,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:43,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 10:47:43,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 10:47:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-15 10:47:43,887 INFO L87 Difference]: Start difference. First operand 27 states and 31 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) [2021-12-15 10:47:43,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:43,996 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-15 10:47:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 10:47:43,996 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 24 [2021-12-15 10:47:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:43,999 INFO L225 Difference]: With dead ends: 80 [2021-12-15 10:47:44,000 INFO L226 Difference]: Without dead ends: 64 [2021-12-15 10:47:44,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-15 10:47:44,003 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:44,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 109 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-15 10:47:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2021-12-15 10:47:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-15 10:47:44,014 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-12-15 10:47:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:44,014 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-15 10:47:44,014 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) [2021-12-15 10:47:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-15 10:47:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 10:47:44,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:44,016 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:44,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:44,222 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 [2021-12-15 10:47:44,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2070168231, now seen corresponding path program 2 times [2021-12-15 10:47:44,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:44,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293601554] [2021-12-15 10:47:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:44,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 10:47:44,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:44,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293601554] [2021-12-15 10:47:44,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293601554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:44,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152185659] [2021-12-15 10:47:44,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:47:44,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:44,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:44,293 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) [2021-12-15 10:47:44,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:47:44,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:47:44,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:44,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 10:47:44,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 10:47:44,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 10:47:44,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152185659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:44,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:44,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-15 10:47:44,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773005487] [2021-12-15 10:47:44,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:44,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 10:47:44,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 10:47:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-15 10:47:44,508 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:44,681 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2021-12-15 10:47:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 10:47:44,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-15 10:47:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:44,682 INFO L225 Difference]: With dead ends: 82 [2021-12-15 10:47:44,682 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 10:47:44,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2021-12-15 10:47:44,683 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 170 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:44,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 76 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:47:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 10:47:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2021-12-15 10:47:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-12-15 10:47:44,689 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 30 [2021-12-15 10:47:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:44,689 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-12-15 10:47:44,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-12-15 10:47:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 10:47:44,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:44,691 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:44,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:44,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:44,901 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:44,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash 271285953, now seen corresponding path program 3 times [2021-12-15 10:47:44,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:44,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664561788] [2021-12-15 10:47:44,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:44,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 10:47:45,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:45,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664561788] [2021-12-15 10:47:45,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664561788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:45,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309124260] [2021-12-15 10:47:45,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:47:45,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:45,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:45,008 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) [2021-12-15 10:47:45,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:47:45,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 10:47:45,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:45,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 10:47:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 63 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-15 10:47:45,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 63 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-15 10:47:45,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309124260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:45,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:45,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-15 10:47:45,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864090210] [2021-12-15 10:47:45,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:45,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 10:47:45,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:45,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 10:47:45,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:47:45,252 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:45,378 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2021-12-15 10:47:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 10:47:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-15 10:47:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:45,379 INFO L225 Difference]: With dead ends: 79 [2021-12-15 10:47:45,379 INFO L226 Difference]: Without dead ends: 72 [2021-12-15 10:47:45,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-12-15 10:47:45,380 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:45,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 78 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:47:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-15 10:47:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-15 10:47:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2021-12-15 10:47:45,385 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 58 [2021-12-15 10:47:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:45,386 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2021-12-15 10:47:45,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2021-12-15 10:47:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 10:47:45,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:45,387 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:45,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:45,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:45,595 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:45,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1550484977, now seen corresponding path program 4 times [2021-12-15 10:47:45,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:45,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443187890] [2021-12-15 10:47:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:45,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-15 10:47:45,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443187890] [2021-12-15 10:47:45,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443187890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436522852] [2021-12-15 10:47:45,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:47:45,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:45,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:45,665 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) [2021-12-15 10:47:45,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 10:47:45,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:47:45,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:45,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 10:47:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 10:47:45,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 10:47:45,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436522852] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:45,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:45,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 13 [2021-12-15 10:47:45,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210350155] [2021-12-15 10:47:45,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:45,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 10:47:45,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:45,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 10:47:45,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-15 10:47:45,944 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:46,218 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2021-12-15 10:47:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 10:47:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-15 10:47:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:46,219 INFO L225 Difference]: With dead ends: 137 [2021-12-15 10:47:46,219 INFO L226 Difference]: Without dead ends: 113 [2021-12-15 10:47:46,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 10:47:46,220 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:46,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 77 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:47:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-15 10:47:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2021-12-15 10:47:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 104 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2021-12-15 10:47:46,227 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 66 [2021-12-15 10:47:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:46,227 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2021-12-15 10:47:46,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2021-12-15 10:47:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 10:47:46,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:46,228 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:46,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:46,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:46,429 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:46,429 INFO L85 PathProgramCache]: Analyzing trace with hash 96032675, now seen corresponding path program 5 times [2021-12-15 10:47:46,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:46,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875417921] [2021-12-15 10:47:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:46,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-15 10:47:46,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:46,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875417921] [2021-12-15 10:47:46,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875417921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:46,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835432503] [2021-12-15 10:47:46,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:47:46,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:46,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:46,680 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) [2021-12-15 10:47:46,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 10:47:46,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-15 10:47:46,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-15 10:47:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:46,891 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-15 10:47:46,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2021-12-15 10:47:47,294 INFO L354 Elim1Store]: treesize reduction 274, result has 11.6 percent of original size [2021-12-15 10:47:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 76 treesize of output 57 [2021-12-15 10:47:47,463 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-12-15 10:47:47,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 13 [2021-12-15 10:47:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 158 proven. 43 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-15 10:47:47,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 167 proven. 24 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 10:47:48,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835432503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:48,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:48,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 23, 19] total 51 [2021-12-15 10:47:48,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423712244] [2021-12-15 10:47:48,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:48,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-15 10:47:48,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:48,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-15 10:47:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2347, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 10:47:48,503 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand has 51 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 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) [2021-12-15 10:48:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:07,317 INFO L93 Difference]: Finished difference Result 948 states and 1226 transitions. [2021-12-15 10:48:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2021-12-15 10:48:07,318 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 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) Word has length 69 [2021-12-15 10:48:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:07,321 INFO L225 Difference]: With dead ends: 948 [2021-12-15 10:48:07,321 INFO L226 Difference]: Without dead ends: 879 [2021-12-15 10:48:07,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21617 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=4989, Invalid=56760, Unknown=3, NotChecked=0, Total=61752 [2021-12-15 10:48:07,336 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 438 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 641 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:07,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 271 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1295 Invalid, 0 Unknown, 641 Unchecked, 0.8s Time] [2021-12-15 10:48:07,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-12-15 10:48:07,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 501. [2021-12-15 10:48:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.338) internal successors, (669), 500 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 669 transitions. [2021-12-15 10:48:07,383 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 669 transitions. Word has length 69 [2021-12-15 10:48:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:07,384 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 669 transitions. [2021-12-15 10:48:07,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 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) [2021-12-15 10:48:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 669 transitions. [2021-12-15 10:48:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 10:48:07,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:07,388 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:07,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 10:48:07,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:07,593 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1086320869, now seen corresponding path program 1 times [2021-12-15 10:48:07,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:07,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301753032] [2021-12-15 10:48:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:07,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-12-15 10:48:07,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:07,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301753032] [2021-12-15 10:48:07,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301753032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:48:07,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:48:07,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 10:48:07,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876633482] [2021-12-15 10:48:07,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:48:07,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 10:48:07,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 10:48:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:48:07,858 INFO L87 Difference]: Start difference. First operand 501 states and 669 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:07,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:07,989 INFO L93 Difference]: Finished difference Result 757 states and 1014 transitions. [2021-12-15 10:48:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 10:48:07,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-15 10:48:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:07,991 INFO L225 Difference]: With dead ends: 757 [2021-12-15 10:48:07,991 INFO L226 Difference]: Without dead ends: 356 [2021-12-15 10:48:07,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:48:07,995 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:07,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 54 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:48:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-15 10:48:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2021-12-15 10:48:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.3295774647887324) internal successors, (472), 355 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 472 transitions. [2021-12-15 10:48:08,012 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 472 transitions. Word has length 69 [2021-12-15 10:48:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:08,012 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 472 transitions. [2021-12-15 10:48:08,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 472 transitions. [2021-12-15 10:48:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 10:48:08,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:08,014 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:08,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 10:48:08,015 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:08,015 INFO L85 PathProgramCache]: Analyzing trace with hash 481554917, now seen corresponding path program 2 times [2021-12-15 10:48:08,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:08,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443068542] [2021-12-15 10:48:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:08,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-15 10:48:08,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443068542] [2021-12-15 10:48:08,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443068542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967362511] [2021-12-15 10:48:08,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:48:08,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:08,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:08,419 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) [2021-12-15 10:48:08,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 10:48:08,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:48:08,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:48:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-15 10:48:08,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:08,522 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 10:48:08,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-15 10:48:08,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 10:48:08,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 10:48:08,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 10:48:08,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 10:48:08,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 10:48:08,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 10:48:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-15 10:48:09,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:09,092 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_339) |c_ULTIMATE.start_main_~#array~1#1.base|) |c_ULTIMATE.start_main_~#array~1#1.offset|) 0)) is different from false [2021-12-15 10:48:09,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:09,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2021-12-15 10:48:09,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:09,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2021-12-15 10:48:09,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-15 10:48:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 18 not checked. [2021-12-15 10:48:09,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967362511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:09,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:09,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 27 [2021-12-15 10:48:09,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623163488] [2021-12-15 10:48:09,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:09,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 10:48:09,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 10:48:09,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=607, Unknown=1, NotChecked=50, Total=756 [2021-12-15 10:48:09,463 INFO L87 Difference]: Start difference. First operand 356 states and 472 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:10,972 INFO L93 Difference]: Finished difference Result 918 states and 1208 transitions. [2021-12-15 10:48:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-15 10:48:10,972 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-15 10:48:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:10,975 INFO L225 Difference]: With dead ends: 918 [2021-12-15 10:48:10,975 INFO L226 Difference]: Without dead ends: 751 [2021-12-15 10:48:10,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=573, Invalid=3981, Unknown=6, NotChecked=132, Total=4692 [2021-12-15 10:48:10,976 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 179 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:10,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 285 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 268 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2021-12-15 10:48:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-12-15 10:48:10,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 195. [2021-12-15 10:48:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.309278350515464) internal successors, (254), 194 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 254 transitions. [2021-12-15 10:48:10,991 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 254 transitions. Word has length 69 [2021-12-15 10:48:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:10,992 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 254 transitions. [2021-12-15 10:48:10,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 254 transitions. [2021-12-15 10:48:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 10:48:10,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:10,994 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:11,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 10:48:11,207 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 [2021-12-15 10:48:11,207 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1330318915, now seen corresponding path program 1 times [2021-12-15 10:48:11,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618357024] [2021-12-15 10:48:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:11,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-15 10:48:11,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:11,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618357024] [2021-12-15 10:48:11,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618357024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:11,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540350249] [2021-12-15 10:48:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:11,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:11,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:11,536 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) [2021-12-15 10:48:11,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 10:48:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-15 10:48:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:11,635 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 10:48:11,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-15 10:48:11,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 10:48:11,797 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 10:48:11,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 10:48:11,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:11,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:12,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:12,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-15 10:48:12,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:12,279 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_402 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_402) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) is different from false [2021-12-15 10:48:12,406 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_402 (Array Int Int)) (v_ArrVal_396 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_396)) |c_~#array~0.base| v_ArrVal_402) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) is different from false [2021-12-15 10:48:12,418 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_56| Int)) (or (forall ((v_ArrVal_402 (Array Int Int)) (v_ArrVal_396 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_56| 4)) v_ArrVal_396)) |c_~#array~0.base| v_ArrVal_402) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) (< |c_ULTIMATE.start_main_~i~1#1| (+ |v_ULTIMATE.start_main_~i~1#1_56| 1)))) is different from false [2021-12-15 10:48:12,435 INFO L354 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2021-12-15 10:48:12,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2021-12-15 10:48:12,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:12,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-12-15 10:48:12,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 10:48:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 221 trivial. 25 not checked. [2021-12-15 10:48:12,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540350249] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:12,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:12,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 33 [2021-12-15 10:48:12,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108484066] [2021-12-15 10:48:12,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:12,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 10:48:12,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 10:48:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=836, Unknown=3, NotChecked=180, Total=1122 [2021-12-15 10:48:12,568 INFO L87 Difference]: Start difference. First operand 195 states and 254 transitions. Second operand has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:14,806 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_~#array~0.base|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (and (= |c_~#array~0.base| 3) (not (= |c_ULTIMATE.start_main_~#array~1#1.base| 3)) (= |c_ULTIMATE.start_main_~i~1#1| 1) (= 0 |c_~#array~0.offset|) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| .cse1)) |c_ULTIMATE.start_main_~i~1#1|) (= 1 (select |c_#valid| 3)) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (= (select .cse2 (+ |c_~#array~0.offset| 12)) 0) (forall ((|v_ULTIMATE.start_main_~i~1#1_56| Int)) (or (forall ((v_ArrVal_402 (Array Int Int)) (v_ArrVal_396 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_56| 4)) v_ArrVal_396)) |c_~#array~0.base| v_ArrVal_402) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) (< |c_ULTIMATE.start_main_~i~1#1| (+ |v_ULTIMATE.start_main_~i~1#1_56| 1)))) (= (select .cse2 (+ |c_~#array~0.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| .cse1 4)) (+ |c_ULTIMATE.start_main_~i~1#1| 1)))) is different from false [2021-12-15 10:48:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:15,582 INFO L93 Difference]: Finished difference Result 389 states and 505 transitions. [2021-12-15 10:48:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 10:48:15,583 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 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 73 [2021-12-15 10:48:15,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:15,584 INFO L225 Difference]: With dead ends: 389 [2021-12-15 10:48:15,584 INFO L226 Difference]: Without dead ends: 220 [2021-12-15 10:48:15,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=362, Invalid=2512, Unknown=4, NotChecked=428, Total=3306 [2021-12-15 10:48:15,585 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 183 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:15,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 337 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 512 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2021-12-15 10:48:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-15 10:48:15,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 196. [2021-12-15 10:48:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.3025641025641026) internal successors, (254), 195 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 254 transitions. [2021-12-15 10:48:15,597 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 254 transitions. Word has length 73 [2021-12-15 10:48:15,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:15,597 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 254 transitions. [2021-12-15 10:48:15,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 254 transitions. [2021-12-15 10:48:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 10:48:15,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:15,598 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:15,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 10:48:15,803 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 [2021-12-15 10:48:15,804 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -522064555, now seen corresponding path program 2 times [2021-12-15 10:48:15,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:15,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348105191] [2021-12-15 10:48:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:15,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 94 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-15 10:48:16,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348105191] [2021-12-15 10:48:16,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348105191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508299720] [2021-12-15 10:48:16,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:48:16,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:16,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:16,129 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) [2021-12-15 10:48:16,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 10:48:16,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:48:16,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:48:16,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 10:48:16,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:16,232 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 10:48:16,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-15 10:48:16,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 10:48:16,353 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 10:48:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 10:48:16,390 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 10:48:16,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 10:48:16,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:16,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:16,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:16,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:16,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-15 10:48:16,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:16,958 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_467 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_467) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2)) is different from false [2021-12-15 10:48:17,096 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 Int) (v_ArrVal_467 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_461)) |c_~#array~0.base| v_ArrVal_467) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2)) is different from false [2021-12-15 10:48:17,105 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_71| Int)) (or (< |c_ULTIMATE.start_main_~i~1#1| (+ |v_ULTIMATE.start_main_~i~1#1_71| 1)) (forall ((v_ArrVal_461 Int) (v_ArrVal_467 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_71| 4)) v_ArrVal_461)) |c_~#array~0.base| v_ArrVal_467) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2)))) is different from false [2021-12-15 10:48:17,115 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 Int) (v_ArrVal_460 Int) (|v_ULTIMATE.start_main_~i~1#1_71| Int) (v_ArrVal_467 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~i~1#1| (+ |v_ULTIMATE.start_main_~i~1#1_71| 1)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_460) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_71| 4)) v_ArrVal_461)) |c_~#array~0.base| v_ArrVal_467) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2))) is different from false [2021-12-15 10:48:17,138 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_72| Int)) (or (forall ((v_ArrVal_461 Int) (v_ArrVal_460 Int) (|v_ULTIMATE.start_main_~i~1#1_71| Int) (v_ArrVal_467 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_72| 4)) v_ArrVal_460) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_71| 4)) v_ArrVal_461)) |c_~#array~0.base| v_ArrVal_467) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2) (< |v_ULTIMATE.start_main_~i~1#1_72| (+ |v_ULTIMATE.start_main_~i~1#1_71| 1)))) (< |c_ULTIMATE.start_main_~i~1#1| (+ |v_ULTIMATE.start_main_~i~1#1_72| 1)))) is different from false [2021-12-15 10:48:17,162 INFO L354 Elim1Store]: treesize reduction 122, result has 23.3 percent of original size [2021-12-15 10:48:17,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 49 [2021-12-15 10:48:17,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:17,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-12-15 10:48:17,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 10:48:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 221 trivial. 30 not checked. [2021-12-15 10:48:17,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508299720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:17,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:17,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 38 [2021-12-15 10:48:17,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784201304] [2021-12-15 10:48:17,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:17,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 10:48:17,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 10:48:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1021, Unknown=5, NotChecked=340, Total=1482 [2021-12-15 10:48:17,277 INFO L87 Difference]: Start difference. First operand 196 states and 254 transitions. Second operand has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:19,503 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_~#array~0.base|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (and (= |c_~#array~0.base| 3) (not (= |c_ULTIMATE.start_main_~#array~1#1.base| 3)) (= 0 |c_~#array~0.offset|) (= |c_ULTIMATE.start_main_~i~1#1| 2) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| .cse1)) |c_ULTIMATE.start_main_~i~1#1|) (= (select .cse2 (+ |c_~#array~0.offset| 16)) 0) (= 1 (select |c_#valid| 3)) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (= (select .cse2 (+ |c_~#array~0.offset| 12)) 0) (forall ((|v_ULTIMATE.start_main_~i~1#1_72| Int)) (or (forall ((v_ArrVal_461 Int) (v_ArrVal_460 Int) (|v_ULTIMATE.start_main_~i~1#1_71| Int) (v_ArrVal_467 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_72| 4)) v_ArrVal_460) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_71| 4)) v_ArrVal_461)) |c_~#array~0.base| v_ArrVal_467) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2) (< |v_ULTIMATE.start_main_~i~1#1_72| (+ |v_ULTIMATE.start_main_~i~1#1_71| 1)))) (< |c_ULTIMATE.start_main_~i~1#1| (+ |v_ULTIMATE.start_main_~i~1#1_72| 1)))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| .cse1 8)) (+ |c_ULTIMATE.start_main_~i~1#1| 2)) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| .cse1 4)) (+ |c_ULTIMATE.start_main_~i~1#1| 1)))) is different from false [2021-12-15 10:48:25,574 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#array~0.base|))) (and (= |c_~#array~0.base| 3) (not (= |c_ULTIMATE.start_main_~#array~1#1.base| 3)) (= 0 |c_~#array~0.offset|) (= (select .cse0 (+ |c_~#array~0.offset| 16)) 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2) (<= |c_ULTIMATE.start_main_~i~1#1| 1) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (= (select .cse0 (+ |c_~#array~0.offset| 12)) 0) (forall ((|v_ULTIMATE.start_main_~i~1#1_71| Int)) (or (< |c_ULTIMATE.start_main_~i~1#1| (+ |v_ULTIMATE.start_main_~i~1#1_71| 1)) (forall ((v_ArrVal_461 Int) (v_ArrVal_467 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_71| 4)) v_ArrVal_461)) |c_~#array~0.base| v_ArrVal_467) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2)))))) is different from false [2021-12-15 10:48:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:26,357 INFO L93 Difference]: Finished difference Result 386 states and 502 transitions. [2021-12-15 10:48:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 10:48:26,357 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 10:48:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:26,358 INFO L225 Difference]: With dead ends: 386 [2021-12-15 10:48:26,358 INFO L226 Difference]: Without dead ends: 215 [2021-12-15 10:48:26,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 132 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=305, Invalid=2686, Unknown=7, NotChecked=784, Total=3782 [2021-12-15 10:48:26,359 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 72 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:26,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 362 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 421 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2021-12-15 10:48:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-15 10:48:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 201. [2021-12-15 10:48:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.295) internal successors, (259), 200 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2021-12-15 10:48:26,372 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 77 [2021-12-15 10:48:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:26,372 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2021-12-15 10:48:26,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2021-12-15 10:48:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 10:48:26,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:26,373 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:26,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 10:48:26,583 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 [2021-12-15 10:48:26,583 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:26,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1539614679, now seen corresponding path program 3 times [2021-12-15 10:48:26,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:26,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55154057] [2021-12-15 10:48:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:26,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 55 proven. 170 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 10:48:27,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:27,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55154057] [2021-12-15 10:48:27,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55154057] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:27,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554496317] [2021-12-15 10:48:27,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:48:27,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:27,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:27,801 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) [2021-12-15 10:48:27,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 10:48:27,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 10:48:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:48:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 10:48:27,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:28,047 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-15 10:48:28,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 10:48:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:28,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-15 10:48:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:28,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-15 10:48:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:28,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-15 10:48:28,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:28,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-15 10:48:28,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:28,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-15 10:48:28,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-12-15 10:48:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-15 10:48:28,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:28,860 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_526 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_526) |c_~#array~0.base|))) (<= (select .cse0 |c_~#array~0.offset|) (select .cse0 (+ |c_~#array~0.offset| 8))))) is different from false [2021-12-15 10:48:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 44 proven. 84 refuted. 0 times theorem prover too weak. 136 trivial. 9 not checked. [2021-12-15 10:48:28,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554496317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:28,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:28,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 8, 12] total 47 [2021-12-15 10:48:28,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397870418] [2021-12-15 10:48:28,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:28,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-15 10:48:28,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:28,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-15 10:48:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1974, Unknown=1, NotChecked=90, Total=2256 [2021-12-15 10:48:28,924 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 47 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) [2021-12-15 10:48:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:48:29,645 INFO L93 Difference]: Finished difference Result 389 states and 503 transitions. [2021-12-15 10:48:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 10:48:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 47 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) Word has length 81 [2021-12-15 10:48:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:48:29,646 INFO L225 Difference]: With dead ends: 389 [2021-12-15 10:48:29,646 INFO L226 Difference]: Without dead ends: 208 [2021-12-15 10:48:29,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=408, Invalid=3255, Unknown=1, NotChecked=118, Total=3782 [2021-12-15 10:48:29,647 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:48:29,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 216 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 387 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2021-12-15 10:48:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-15 10:48:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2021-12-15 10:48:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.29) internal successors, (258), 200 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:48:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 258 transitions. [2021-12-15 10:48:29,661 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 258 transitions. Word has length 81 [2021-12-15 10:48:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:48:29,661 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 258 transitions. [2021-12-15 10:48:29,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 47 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) [2021-12-15 10:48:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 258 transitions. [2021-12-15 10:48:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 10:48:29,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:48:29,662 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:48:29,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 10:48:29,873 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 [2021-12-15 10:48:29,873 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash -860342425, now seen corresponding path program 4 times [2021-12-15 10:48:29,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:29,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989044316] [2021-12-15 10:48:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:29,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-15 10:48:30,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:30,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989044316] [2021-12-15 10:48:30,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989044316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:30,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388283489] [2021-12-15 10:48:30,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:48:30,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:30,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:30,633 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) [2021-12-15 10:48:30,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 10:48:30,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:48:30,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:48:30,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-15 10:48:30,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:31,050 INFO L354 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2021-12-15 10:48:31,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 42 [2021-12-15 10:48:31,218 INFO L354 Elim1Store]: treesize reduction 228, result has 8.8 percent of original size [2021-12-15 10:48:31,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 40 [2021-12-15 10:48:31,307 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-15 10:48:31,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2021-12-15 10:48:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 55 proven. 168 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 10:48:31,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:33,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 91 [2021-12-15 10:48:33,117 INFO L354 Elim1Store]: treesize reduction 81, result has 52.1 percent of original size [2021-12-15 10:48:33,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 13956 treesize of output 13794 [2021-12-15 10:48:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 148 proven. 53 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-15 10:48:33,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388283489] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:33,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:33,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 16] total 55 [2021-12-15 10:48:33,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95975090] [2021-12-15 10:48:33,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:33,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-15 10:48:33,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-15 10:48:33,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2021-12-15 10:48:33,775 INFO L87 Difference]: Start difference. First operand 201 states and 258 transitions. Second operand has 55 states, 55 states have (on average 2.709090909090909) internal successors, (149), 55 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)