./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mbpr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/mbpr3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:45:46,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:45:46,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:45:46,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:45:46,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:45:46,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:45:46,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:45:46,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:45:46,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:45:46,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:45:46,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:45:46,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:45:46,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:45:46,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:45:46,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:45:46,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:45:46,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:45:46,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:45:46,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:45:46,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:45:46,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:45:46,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:45:46,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:45:46,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:45:46,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:45:46,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:45:46,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:45:46,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:45:46,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:45:46,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:45:46,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:45:46,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:45:46,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:45:46,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:45:46,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:45:46,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:45:46,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:45:46,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:45:46,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:45:46,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:45:46,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:45:46,443 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:45:46,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:45:46,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:45:46,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:45:46,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:45:46,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:45:46,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:45:46,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:45:46,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:45:46,483 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:45:46,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:45:46,484 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:45:46,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:45:46,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:45:46,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:45:46,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:45:46,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:45:46,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:45:46,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:45:46,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:45:46,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:45:46,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:45:46,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:45:46,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:45:46,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:45:46,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:45:46,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:45:46,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:45:46,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:45:46,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:45:46,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:45:46,488 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:45:46,488 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:45:46,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:45:46,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:45:46,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 [2021-12-16 22:45:46,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:45:46,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:45:46,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:45:46,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:45:46,721 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:45:46,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mbpr3.c [2021-12-16 22:45:46,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649ff11c0/b84b381e3ee54e47b7569e7070c40265/FLAGf7a81f675 [2021-12-16 22:45:47,154 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:45:47,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr3.c [2021-12-16 22:45:47,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649ff11c0/b84b381e3ee54e47b7569e7070c40265/FLAGf7a81f675 [2021-12-16 22:45:47,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649ff11c0/b84b381e3ee54e47b7569e7070c40265 [2021-12-16 22:45:47,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:45:47,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:45:47,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:45:47,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:45:47,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:45:47,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283a8df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47, skipping insertion in model container [2021-12-16 22:45:47,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:45:47,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:45:47,332 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2021-12-16 22:45:47,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:45:47,358 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:45:47,368 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2021-12-16 22:45:47,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:45:47,392 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:45:47,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47 WrapperNode [2021-12-16 22:45:47,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:45:47,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:45:47,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:45:47,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:45:47,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,427 INFO L137 Inliner]: procedures = 15, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 107 [2021-12-16 22:45:47,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:45:47,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:45:47,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:45:47,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:45:47,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:45:47,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:45:47,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:45:47,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:45:47,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (1/1) ... [2021-12-16 22:45:47,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:45:47,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:45:47,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 22:45:47,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 22:45:47,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:45:47,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:45:47,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:45:47,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:45:47,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:45:47,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:45:47,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:45:47,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:45:47,593 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:45:47,595 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:45:47,770 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:45:47,776 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:45:47,776 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 22:45:47,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:45:47 BoogieIcfgContainer [2021-12-16 22:45:47,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:45:47,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:45:47,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:45:47,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:45:47,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:45:47" (1/3) ... [2021-12-16 22:45:47,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebf9f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:45:47, skipping insertion in model container [2021-12-16 22:45:47,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:45:47" (2/3) ... [2021-12-16 22:45:47,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebf9f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:45:47, skipping insertion in model container [2021-12-16 22:45:47,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:45:47" (3/3) ... [2021-12-16 22:45:47,786 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2021-12-16 22:45:47,790 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:45:47,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:45:47,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:45:47,856 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 [2021-12-16 22:45:47,870 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:45:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.53125) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 22:45:47,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:45:47,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:45:47,909 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:45:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:45:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash -565609025, now seen corresponding path program 1 times [2021-12-16 22:45:47,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:45:47,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311923542] [2021-12-16 22:45:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:47,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:45:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:45:48,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:45:48,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311923542] [2021-12-16 22:45:48,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311923542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:45:48,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:45:48,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 22:45:48,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522982153] [2021-12-16 22:45:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:45:48,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 22:45:48,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:45:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 22:45:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:45:48,124 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.53125) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:45:48,144 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2021-12-16 22:45:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 22:45:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 22:45:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:45:48,153 INFO L225 Difference]: With dead ends: 63 [2021-12-16 22:45:48,154 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 22:45:48,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:45:48,161 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:45:48,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:45:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 22:45:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-16 22:45:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-16 22:45:48,206 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2021-12-16 22:45:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:45:48,207 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-16 22:45:48,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-16 22:45:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 22:45:48,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:45:48,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:45:48,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:45:48,211 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:45:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:45:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1539779609, now seen corresponding path program 1 times [2021-12-16 22:45:48,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:45:48,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32311670] [2021-12-16 22:45:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:48,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:45:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:45:48,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:45:48,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32311670] [2021-12-16 22:45:48,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32311670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:45:48,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:45:48,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 22:45:48,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803001186] [2021-12-16 22:45:48,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:45:48,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:45:48,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:45:48,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:45:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:45:48,354 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:45:48,398 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-12-16 22:45:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:45:48,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 22:45:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:45:48,401 INFO L225 Difference]: With dead ends: 38 [2021-12-16 22:45:48,401 INFO L226 Difference]: Without dead ends: 36 [2021-12-16 22:45:48,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:45:48,406 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:45:48,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 98 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:45:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-16 22:45:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-12-16 22:45:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-12-16 22:45:48,416 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 17 [2021-12-16 22:45:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:45:48,417 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-12-16 22:45:48,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-12-16 22:45:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 22:45:48,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:45:48,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:45:48,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 22:45:48,422 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:45:48,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:45:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1539720027, now seen corresponding path program 1 times [2021-12-16 22:45:48,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:45:48,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124195144] [2021-12-16 22:45:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:48,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:45:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:45:48,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:45:48,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124195144] [2021-12-16 22:45:48,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124195144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:45:48,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:45:48,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 22:45:48,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602747483] [2021-12-16 22:45:48,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:45:48,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 22:45:48,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:45:48,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 22:45:48,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:45:48,637 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:45:48,733 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2021-12-16 22:45:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:45:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 22:45:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:45:48,734 INFO L225 Difference]: With dead ends: 64 [2021-12-16 22:45:48,734 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 22:45:48,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:45:48,736 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:45:48,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 23 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:45:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 22:45:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-12-16 22:45:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-12-16 22:45:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-16 22:45:48,742 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-12-16 22:45:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:45:48,742 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-16 22:45:48,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-16 22:45:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 22:45:48,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:45:48,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:45:48,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 22:45:48,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:45:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:45:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2048606314, now seen corresponding path program 1 times [2021-12-16 22:45:48,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:45:48,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634270176] [2021-12-16 22:45:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:48,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:45:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:45:48,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:45:48,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634270176] [2021-12-16 22:45:48,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634270176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:45:48,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:45:48,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:45:48,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611369404] [2021-12-16 22:45:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:45:48,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:45:48,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:45:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:45:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:45:48,807 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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) [2021-12-16 22:45:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:45:48,818 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-12-16 22:45:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:45:48,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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) Word has length 29 [2021-12-16 22:45:48,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:45:48,819 INFO L225 Difference]: With dead ends: 49 [2021-12-16 22:45:48,819 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 22:45:48,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:45:48,821 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:45:48,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:45:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 22:45:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-16 22:45:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-16 22:45:48,826 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2021-12-16 22:45:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:45:48,826 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-16 22:45:48,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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) [2021-12-16 22:45:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-16 22:45:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 22:45:48,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:45:48,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:45:48,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 22:45:48,828 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:45:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:45:48,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1853333972, now seen corresponding path program 1 times [2021-12-16 22:45:48,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:45:48,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436489605] [2021-12-16 22:45:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:48,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:45:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:45:49,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:45:49,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436489605] [2021-12-16 22:45:49,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436489605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:45:49,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690262282] [2021-12-16 22:45:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:49,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:45:49,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:45:49,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:45:49,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:45:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 22:45:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:45:49,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:45:49,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:49,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:49,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:49,472 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 26 treesize of output 29 [2021-12-16 22:45:49,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:49,543 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 29 treesize of output 28 [2021-12-16 22:45:49,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:49,566 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 28 treesize of output 20 [2021-12-16 22:45:49,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:49,623 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 29 treesize of output 28 [2021-12-16 22:45:49,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2021-12-16 22:45:49,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:49,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:49,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:45:49,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:45:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:45:49,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:45:50,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-16 22:45:50,005 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 28 treesize of output 26 [2021-12-16 22:45:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:45:50,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690262282] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:45:50,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:45:50,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2021-12-16 22:45:50,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390802537] [2021-12-16 22:45:50,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:45:50,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 22:45:50,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:45:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 22:45:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-16 22:45:50,071 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:50,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:45:50,366 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2021-12-16 22:45:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 22:45:50,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-16 22:45:50,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:45:50,368 INFO L225 Difference]: With dead ends: 90 [2021-12-16 22:45:50,368 INFO L226 Difference]: Without dead ends: 63 [2021-12-16 22:45:50,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-12-16 22:45:50,369 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 202 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:45:50,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 86 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:45:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-16 22:45:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2021-12-16 22:45:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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) [2021-12-16 22:45:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-16 22:45:50,375 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2021-12-16 22:45:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:45:50,376 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-16 22:45:50,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-16 22:45:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 22:45:50,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:45:50,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:45:50,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:45:50,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:45:50,578 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:45:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:45:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash -166695065, now seen corresponding path program 1 times [2021-12-16 22:45:50,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:45:50,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007660313] [2021-12-16 22:45:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:50,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:45:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:45:50,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:45:50,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007660313] [2021-12-16 22:45:50,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007660313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:45:50,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613639735] [2021-12-16 22:45:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:50,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:45:50,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:45:50,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:45:50,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:45:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:45:50,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:45:50,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:45:50,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:50,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:51,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:45:51,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:45:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:51,070 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 29 treesize of output 28 [2021-12-16 22:45:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:45:51,088 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 35 treesize of output 23 [2021-12-16 22:45:51,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:45:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:45:51,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:45:51,417 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 17 treesize of output 15 [2021-12-16 22:45:51,420 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 34 treesize of output 30 [2021-12-16 22:45:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:45:51,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613639735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:45:51,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:45:51,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-16 22:45:51,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765899110] [2021-12-16 22:45:51,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:45:51,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:45:51,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:45:51,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:45:51,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:45:51,493 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:45:51,795 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-12-16 22:45:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 22:45:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-16 22:45:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:45:51,797 INFO L225 Difference]: With dead ends: 79 [2021-12-16 22:45:51,797 INFO L226 Difference]: Without dead ends: 56 [2021-12-16 22:45:51,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-16 22:45:51,799 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:45:51,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 73 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:45:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-16 22:45:51,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2021-12-16 22:45:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-16 22:45:51,805 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 35 [2021-12-16 22:45:51,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:45:51,805 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-16 22:45:51,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:51,806 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-16 22:45:51,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 22:45:51,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:45:51,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:45:51,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:45:52,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 22:45:52,038 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:45:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:45:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash 693076666, now seen corresponding path program 2 times [2021-12-16 22:45:52,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:45:52,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198938264] [2021-12-16 22:45:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:52,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:45:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:45:52,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:45:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198938264] [2021-12-16 22:45:52,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198938264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:45:52,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806758129] [2021-12-16 22:45:52,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:45:52,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:45:52,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:45:52,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:45:52,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:45:52,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:45:52,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:45:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 22:45:52,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:45:52,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:45:52,348 INFO L354 Elim1Store]: treesize reduction 74, result has 20.4 percent of original size [2021-12-16 22:45:52,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2021-12-16 22:45:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:45:52,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:45:52,617 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 17 treesize of output 15 [2021-12-16 22:45:52,620 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 30 treesize of output 26 [2021-12-16 22:45:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:45:52,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806758129] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:45:52,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:45:52,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2021-12-16 22:45:52,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951113222] [2021-12-16 22:45:52,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:45:52,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:45:52,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:45:52,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:45:52,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:45:52,647 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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) [2021-12-16 22:45:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:45:53,016 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-12-16 22:45:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 22:45:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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 41 [2021-12-16 22:45:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:45:53,017 INFO L225 Difference]: With dead ends: 76 [2021-12-16 22:45:53,017 INFO L226 Difference]: Without dead ends: 74 [2021-12-16 22:45:53,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-12-16 22:45:53,018 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 148 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:45:53,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 120 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:45:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-16 22:45:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2021-12-16 22:45:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-16 22:45:53,025 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 41 [2021-12-16 22:45:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:45:53,025 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-16 22:45:53,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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) [2021-12-16 22:45:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-16 22:45:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 22:45:53,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:45:53,026 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:45:53,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:45:53,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:45:53,238 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:45:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:45:53,238 INFO L85 PathProgramCache]: Analyzing trace with hash -296121395, now seen corresponding path program 3 times [2021-12-16 22:45:53,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:45:53,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307272865] [2021-12-16 22:45:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:53,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:45:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:45:53,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:45:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307272865] [2021-12-16 22:45:53,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307272865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:45:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523387434] [2021-12-16 22:45:53,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:45:53,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:45:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:45:53,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:45:53,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:45:53,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 22:45:53,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:45:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 22:45:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:45:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:45:54,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:45:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:45:54,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523387434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:45:54,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:45:54,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2021-12-16 22:45:54,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497780421] [2021-12-16 22:45:54,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:45:54,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 22:45:54,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:45:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 22:45:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-12-16 22:45:54,219 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:45:54,489 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2021-12-16 22:45:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 22:45:54,489 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-16 22:45:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:45:54,490 INFO L225 Difference]: With dead ends: 136 [2021-12-16 22:45:54,490 INFO L226 Difference]: Without dead ends: 69 [2021-12-16 22:45:54,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:45:54,491 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 320 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:45:54,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 125 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:45:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-16 22:45:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-12-16 22:45:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 59 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-12-16 22:45:54,497 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 47 [2021-12-16 22:45:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:45:54,497 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-12-16 22:45:54,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:45:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-12-16 22:45:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:45:54,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:45:54,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:45:54,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:45:54,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:45:54,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:45:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:45:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1825837756, now seen corresponding path program 4 times [2021-12-16 22:45:54,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:45:54,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509306807] [2021-12-16 22:45:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:45:54,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:45:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:45:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 22:45:54,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:45:54,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509306807] [2021-12-16 22:45:54,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509306807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:45:54,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532147953] [2021-12-16 22:45:54,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:45:54,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:45:54,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:45:54,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:45:55,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:45:55,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:45:55,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:45:55,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 22:45:55,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:45:55,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:45:55,201 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-16 22:45:55,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-16 22:45:55,237 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:45:55,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:45:55,270 INFO L354 Elim1Store]: treesize reduction 129, result has 14.6 percent of original size [2021-12-16 22:45:55,270 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 43 treesize of output 37 [2021-12-16 22:45:55,432 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 19 treesize of output 7 [2021-12-16 22:45:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 22:45:55,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:45:57,637 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_80| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_80| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_303 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_80| 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) v_ArrVal_303) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-16 22:45:57,694 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 41 treesize of output 39 [2021-12-16 22:45:57,699 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 3464 treesize of output 3432 [2021-12-16 22:46:05,379 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-16 22:46:05,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:46:05,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-16 22:46:05,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559612588] [2021-12-16 22:46:05,379 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:05,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 22:46:05,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:05,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 22:46:05,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=443, Unknown=1, NotChecked=44, Total=600 [2021-12-16 22:46:05,380 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:05,511 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-12-16 22:46:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 22:46:05,511 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-16 22:46:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:05,512 INFO L225 Difference]: With dead ends: 77 [2021-12-16 22:46:05,512 INFO L226 Difference]: Without dead ends: 67 [2021-12-16 22:46:05,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=137, Invalid=516, Unknown=1, NotChecked=48, Total=702 [2021-12-16 22:46:05,513 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:05,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 92 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:46:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-16 22:46:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-12-16 22:46:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-16 22:46:05,518 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 59 [2021-12-16 22:46:05,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:05,518 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-16 22:46:05,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-16 22:46:05,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:46:05,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:05,520 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:05,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:05,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:05,720 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:05,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1432810746, now seen corresponding path program 5 times [2021-12-16 22:46:05,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:05,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36295883] [2021-12-16 22:46:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:05,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:46:06,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:06,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36295883] [2021-12-16 22:46:06,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36295883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:06,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132932954] [2021-12-16 22:46:06,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:46:06,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:06,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:06,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:06,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:46:06,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 22:46:06,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 22:46:06,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:06,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:46:06,903 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-12-16 22:46:06,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 31 [2021-12-16 22:46:06,964 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:46:06,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:46:06,993 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-16 22:46:06,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-16 22:46:07,044 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:46:07,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:46:07,065 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:46:07,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2021-12-16 22:46:07,102 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:46:07,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:46:07,131 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-16 22:46:07,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-16 22:46:07,167 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:46:07,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:46:07,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-12-16 22:46:07,190 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-16 22:46:07,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 59 treesize of output 46 [2021-12-16 22:46:07,370 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 19 treesize of output 7 [2021-12-16 22:46:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:07,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:07,736 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 17 treesize of output 15 [2021-12-16 22:46:07,740 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 34 treesize of output 30 [2021-12-16 22:46:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 22:46:07,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132932954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:07,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:07,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 29 [2021-12-16 22:46:07,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521248522] [2021-12-16 22:46:07,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:07,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 22:46:07,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 22:46:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:46:07,833 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 29 states, 29 states have (on average 5.655172413793103) internal successors, (164), 29 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:08,585 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2021-12-16 22:46:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 22:46:08,585 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.655172413793103) internal successors, (164), 29 states have internal predecessors, (164), 0 states have call successors, (0), 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 59 [2021-12-16 22:46:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:08,587 INFO L225 Difference]: With dead ends: 143 [2021-12-16 22:46:08,587 INFO L226 Difference]: Without dead ends: 133 [2021-12-16 22:46:08,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 22:46:08,589 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 297 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:08,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 185 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 767 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2021-12-16 22:46:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-16 22:46:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 66. [2021-12-16 22:46:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-16 22:46:08,603 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2021-12-16 22:46:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:08,604 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-16 22:46:08,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.655172413793103) internal successors, (164), 29 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-16 22:46:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 22:46:08,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:08,606 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:08,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:08,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:08,833 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:08,833 INFO L85 PathProgramCache]: Analyzing trace with hash 757222925, now seen corresponding path program 6 times [2021-12-16 22:46:08,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:08,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360697983] [2021-12-16 22:46:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:08,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:09,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:09,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360697983] [2021-12-16 22:46:09,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360697983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:09,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122271721] [2021-12-16 22:46:09,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:46:09,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:09,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:09,926 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:09,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:46:10,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-16 22:46:10,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:10,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-16 22:46:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:10,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:46:10,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,420 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 37 treesize of output 40 [2021-12-16 22:46:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,611 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 26 treesize of output 25 [2021-12-16 22:46:10,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:46:10,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2021-12-16 22:46:10,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,716 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 26 treesize of output 25 [2021-12-16 22:46:10,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 68 [2021-12-16 22:46:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:46:10,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2021-12-16 22:46:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:11,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:12,618 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 35 treesize of output 31 [2021-12-16 22:46:12,622 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 67 treesize of output 59 [2021-12-16 22:46:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:13,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122271721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:13,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:13,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 66 [2021-12-16 22:46:13,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94891462] [2021-12-16 22:46:13,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:13,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-16 22:46:13,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:13,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-16 22:46:13,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=3794, Unknown=0, NotChecked=0, Total=4290 [2021-12-16 22:46:13,427 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 66 states, 66 states have (on average 2.8333333333333335) internal successors, (187), 66 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:21,312 INFO L93 Difference]: Finished difference Result 278 states and 303 transitions. [2021-12-16 22:46:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-12-16 22:46:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.8333333333333335) internal successors, (187), 66 states have internal predecessors, (187), 0 states have call successors, (0), 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 65 [2021-12-16 22:46:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:21,313 INFO L225 Difference]: With dead ends: 278 [2021-12-16 22:46:21,313 INFO L226 Difference]: Without dead ends: 243 [2021-12-16 22:46:21,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7689 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=4220, Invalid=22840, Unknown=0, NotChecked=0, Total=27060 [2021-12-16 22:46:21,319 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1485 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 1074 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 3596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1074 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:21,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 477 Invalid, 3596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1074 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 22:46:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-16 22:46:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 106. [2021-12-16 22:46:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 105 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-12-16 22:46:21,329 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 65 [2021-12-16 22:46:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:21,329 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-12-16 22:46:21,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.8333333333333335) internal successors, (187), 66 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-12-16 22:46:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 22:46:21,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:21,330 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:21,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:21,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:21,544 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1552195955, now seen corresponding path program 7 times [2021-12-16 22:46:21,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:21,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828943316] [2021-12-16 22:46:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:21,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 83 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:46:21,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:21,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828943316] [2021-12-16 22:46:21,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828943316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:21,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096268155] [2021-12-16 22:46:21,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:46:21,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:21,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:21,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:21,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:46:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:21,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 22:46:21,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 114 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:46:22,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 114 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:46:22,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096268155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:22,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:22,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2021-12-16 22:46:22,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977118841] [2021-12-16 22:46:22,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:22,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-16 22:46:22,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-16 22:46:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 22:46:22,816 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 40 states, 40 states have (on average 4.875) internal successors, (195), 40 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:23,177 INFO L93 Difference]: Finished difference Result 216 states and 229 transitions. [2021-12-16 22:46:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 22:46:23,178 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.875) internal successors, (195), 40 states have internal predecessors, (195), 0 states have call successors, (0), 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 [2021-12-16 22:46:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:23,179 INFO L225 Difference]: With dead ends: 216 [2021-12-16 22:46:23,179 INFO L226 Difference]: Without dead ends: 99 [2021-12-16 22:46:23,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 22:46:23,180 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 456 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:23,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 209 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:46:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-16 22:46:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2021-12-16 22:46:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 89 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-12-16 22:46:23,187 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 77 [2021-12-16 22:46:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:23,188 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-12-16 22:46:23,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.875) internal successors, (195), 40 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-12-16 22:46:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 22:46:23,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:23,189 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:23,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:23,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 22:46:23,400 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:23,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1369982430, now seen corresponding path program 8 times [2021-12-16 22:46:23,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:23,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291629331] [2021-12-16 22:46:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:23,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:24,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291629331] [2021-12-16 22:46:24,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291629331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152427420] [2021-12-16 22:46:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:46:24,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:24,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:24,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:46:24,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:46:24,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:24,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 22:46:24,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:24,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:46:24,950 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-16 22:46:24,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-16 22:46:25,007 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:46:25,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:46:25,036 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-16 22:46:25,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-16 22:46:25,446 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 19 treesize of output 7 [2021-12-16 22:46:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 42 proven. 85 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-16 22:46:25,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:27,847 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_164| Int)) (or (forall ((v_ArrVal_696 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_164| 12) (- 4)) v_ArrVal_696) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_164| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-16 22:46:27,924 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 41 treesize of output 39 [2021-12-16 22:46:27,927 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 3464 treesize of output 3432 [2021-12-16 22:46:29,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-16 22:46:29,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:46:29,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-16 22:46:29,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864991243] [2021-12-16 22:46:29,479 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:29,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 22:46:29,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:29,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 22:46:29,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1969, Unknown=1, NotChecked=90, Total=2256 [2021-12-16 22:46:29,481 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:31,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:31,019 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-12-16 22:46:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 22:46:31,020 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-16 22:46:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:31,021 INFO L225 Difference]: With dead ends: 149 [2021-12-16 22:46:31,021 INFO L226 Difference]: Without dead ends: 139 [2021-12-16 22:46:31,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=450, Invalid=4245, Unknown=1, NotChecked=134, Total=4830 [2021-12-16 22:46:31,024 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 438 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:31,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 325 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 22:46:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-16 22:46:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2021-12-16 22:46:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.063157894736842) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-12-16 22:46:31,045 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 89 [2021-12-16 22:46:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:31,046 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-12-16 22:46:31,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:31,046 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-12-16 22:46:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 22:46:31,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:31,047 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:31,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:31,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 22:46:31,264 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:31,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2119920331, now seen corresponding path program 9 times [2021-12-16 22:46:31,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:31,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677199105] [2021-12-16 22:46:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:31,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 16 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:32,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:32,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677199105] [2021-12-16 22:46:32,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677199105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:32,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588052840] [2021-12-16 22:46:32,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:46:32,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:32,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:32,195 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:32,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:46:33,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-16 22:46:33,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:33,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-16 22:46:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:33,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:46:33,411 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-16 22:46:33,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-16 22:46:33,890 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:46:33,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:46:33,976 INFO L354 Elim1Store]: treesize reduction 127, result has 20.6 percent of original size [2021-12-16 22:46:33,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 48 [2021-12-16 22:46:34,361 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:46:34,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-12-16 22:46:34,489 INFO L354 Elim1Store]: treesize reduction 127, result has 20.6 percent of original size [2021-12-16 22:46:34,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 58 [2021-12-16 22:46:35,122 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:46:35,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:46:35,215 INFO L354 Elim1Store]: treesize reduction 283, result has 11.6 percent of original size [2021-12-16 22:46:35,216 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 58 treesize of output 55 [2021-12-16 22:46:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 16 proven. 162 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 22:46:36,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:38,533 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 71 treesize of output 67 [2021-12-16 22:46:38,542 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 21415 treesize of output 21287 [2021-12-16 22:46:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 22:46:39,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588052840] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:39,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:39,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 26] total 76 [2021-12-16 22:46:39,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030532443] [2021-12-16 22:46:39,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:39,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-16 22:46:39,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:39,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-16 22:46:39,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=5190, Unknown=0, NotChecked=0, Total=5700 [2021-12-16 22:46:39,083 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 76 states, 76 states have (on average 3.3289473684210527) internal successors, (253), 76 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:43,996 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2021-12-16 22:46:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-16 22:46:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.3289473684210527) internal successors, (253), 76 states have internal predecessors, (253), 0 states have call successors, (0), 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 95 [2021-12-16 22:46:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:43,998 INFO L225 Difference]: With dead ends: 287 [2021-12-16 22:46:43,998 INFO L226 Difference]: Without dead ends: 277 [2021-12-16 22:46:44,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 161 SyntacticMatches, 12 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8937 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2237, Invalid=26493, Unknown=0, NotChecked=0, Total=28730 [2021-12-16 22:46:44,003 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 413 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 916 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:44,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1022 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 848 Invalid, 0 Unknown, 916 Unchecked, 0.4s Time] [2021-12-16 22:46:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-16 22:46:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 212. [2021-12-16 22:46:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.061611374407583) internal successors, (224), 211 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 224 transitions. [2021-12-16 22:46:44,017 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 224 transitions. Word has length 95 [2021-12-16 22:46:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:44,017 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 224 transitions. [2021-12-16 22:46:44,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.3289473684210527) internal successors, (253), 76 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 224 transitions. [2021-12-16 22:46:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 22:46:44,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:44,019 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:44,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:44,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 22:46:44,224 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1153978611, now seen corresponding path program 10 times [2021-12-16 22:46:44,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82199708] [2021-12-16 22:46:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:44,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:45,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:45,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82199708] [2021-12-16 22:46:45,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82199708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699085641] [2021-12-16 22:46:45,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:46:45,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:45,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:45,443 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:45,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:46:45,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:46:45,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-16 22:46:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:45,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:46:45,841 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-12-16 22:46:45,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 31 [2021-12-16 22:46:45,914 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:46:45,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:46:45,935 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-16 22:46:45,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-16 22:46:45,986 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:46:45,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:46:46,009 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-16 22:46:46,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-16 22:46:46,060 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:46:46,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:46:46,118 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-12-16 22:46:46,118 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 43 treesize of output 34 [2021-12-16 22:46:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 170 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:46:46,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:53,870 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 35 treesize of output 31 [2021-12-16 22:46:53,872 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 67 treesize of output 59 [2021-12-16 22:46:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 22:46:54,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699085641] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:54,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:54,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 21] total 66 [2021-12-16 22:46:54,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263882635] [2021-12-16 22:46:54,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:54,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-16 22:46:54,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:54,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-16 22:46:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=3942, Unknown=1, NotChecked=0, Total=4290 [2021-12-16 22:46:54,280 INFO L87 Difference]: Start difference. First operand 212 states and 224 transitions. Second operand has 66 states, 66 states have (on average 3.9393939393939394) internal successors, (260), 66 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:13,123 INFO L93 Difference]: Finished difference Result 416 states and 450 transitions. [2021-12-16 22:47:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-16 22:47:13,124 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.9393939393939394) internal successors, (260), 66 states have internal predecessors, (260), 0 states have call successors, (0), 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 95 [2021-12-16 22:47:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:13,125 INFO L225 Difference]: With dead ends: 416 [2021-12-16 22:47:13,125 INFO L226 Difference]: Without dead ends: 357 [2021-12-16 22:47:13,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 187 SyntacticMatches, 12 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14751 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=3716, Invalid=38513, Unknown=1, NotChecked=0, Total=42230 [2021-12-16 22:47:13,129 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1279 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 4079 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 5263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 4079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:13,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 870 Invalid, 5263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 4079 Invalid, 0 Unknown, 334 Unchecked, 2.0s Time] [2021-12-16 22:47:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-16 22:47:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 167. [2021-12-16 22:47:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0662650602409638) internal successors, (177), 166 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 177 transitions. [2021-12-16 22:47:13,143 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 177 transitions. Word has length 95 [2021-12-16 22:47:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:13,143 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 177 transitions. [2021-12-16 22:47:13,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.9393939393939394) internal successors, (260), 66 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 177 transitions. [2021-12-16 22:47:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-16 22:47:13,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:13,145 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:13,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:13,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 22:47:13,360 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1722979173, now seen corresponding path program 11 times [2021-12-16 22:47:13,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:13,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492219566] [2021-12-16 22:47:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:13,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 203 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:47:13,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:13,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492219566] [2021-12-16 22:47:13,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492219566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:13,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062692918] [2021-12-16 22:47:13,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:47:13,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:13,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:13,872 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:13,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:47:16,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-16 22:47:16,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 22:47:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 252 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:47:17,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 252 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:47:17,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062692918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:17,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:17,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2021-12-16 22:47:17,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165695708] [2021-12-16 22:47:17,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:17,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-16 22:47:17,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-16 22:47:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=1934, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 22:47:17,609 INFO L87 Difference]: Start difference. First operand 167 states and 177 transitions. Second operand has 51 states, 51 states have (on average 5.098039215686274) internal successors, (260), 51 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:18,137 INFO L93 Difference]: Finished difference Result 369 states and 391 transitions. [2021-12-16 22:47:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 22:47:18,137 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.098039215686274) internal successors, (260), 51 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-16 22:47:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:18,138 INFO L225 Difference]: With dead ends: 369 [2021-12-16 22:47:18,138 INFO L226 Difference]: Without dead ends: 163 [2021-12-16 22:47:18,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=825, Invalid=2597, Unknown=0, NotChecked=0, Total=3422 [2021-12-16 22:47:18,140 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 590 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:18,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 310 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:47:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-16 22:47:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2021-12-16 22:47:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0576923076923077) internal successors, (165), 156 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 165 transitions. [2021-12-16 22:47:18,151 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 165 transitions. Word has length 107 [2021-12-16 22:47:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:18,151 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 165 transitions. [2021-12-16 22:47:18,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.098039215686274) internal successors, (260), 51 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 165 transitions. [2021-12-16 22:47:18,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 22:47:18,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:18,152 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:18,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:18,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 22:47:18,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1366171280, now seen corresponding path program 12 times [2021-12-16 22:47:18,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:18,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253910750] [2021-12-16 22:47:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:18,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-16 22:47:18,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:18,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253910750] [2021-12-16 22:47:18,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253910750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:18,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631853886] [2021-12-16 22:47:18,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:47:18,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:18,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:18,582 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:18,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 22:47:19,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-16 22:47:19,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:19,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 22:47:19,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-16 22:47:20,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-16 22:47:20,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631853886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:20,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:20,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-16 22:47:20,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870724077] [2021-12-16 22:47:20,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:20,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:47:20,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:47:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:47:20,561 INFO L87 Difference]: Start difference. First operand 157 states and 165 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:20,859 INFO L93 Difference]: Finished difference Result 354 states and 375 transitions. [2021-12-16 22:47:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 22:47:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-16 22:47:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:20,860 INFO L225 Difference]: With dead ends: 354 [2021-12-16 22:47:20,860 INFO L226 Difference]: Without dead ends: 234 [2021-12-16 22:47:20,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 222 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:47:20,861 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 303 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:20,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 86 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:47:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-16 22:47:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 201. [2021-12-16 22:47:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.055) internal successors, (211), 200 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 211 transitions. [2021-12-16 22:47:20,874 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 211 transitions. Word has length 117 [2021-12-16 22:47:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:20,875 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 211 transitions. [2021-12-16 22:47:20,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 211 transitions. [2021-12-16 22:47:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 22:47:20,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:20,876 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:20,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:21,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 22:47:21,076 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash -688847094, now seen corresponding path program 13 times [2021-12-16 22:47:21,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:21,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779144843] [2021-12-16 22:47:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:21,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 20 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:23,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:23,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779144843] [2021-12-16 22:47:23,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779144843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:23,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706867861] [2021-12-16 22:47:23,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:47:23,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:23,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:23,558 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:23,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 22:47:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:23,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 22:47:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:23,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:23,944 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-16 22:47:23,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-16 22:47:24,001 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:47:24,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:47:24,024 INFO L354 Elim1Store]: treesize reduction 129, result has 14.6 percent of original size [2021-12-16 22:47:24,024 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 43 treesize of output 37 [2021-12-16 22:47:24,645 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 19 treesize of output 7 [2021-12-16 22:47:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 66 proven. 212 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 22:47:24,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:27,274 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_318| Int)) (or (forall ((v_ArrVal_1392 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_318| 12) (- 4)) v_ArrVal_1392) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 32)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_318| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-16 22:47:27,394 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 41 treesize of output 39 [2021-12-16 22:47:27,398 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 3464 treesize of output 3432 [2021-12-16 22:47:27,754 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-16 22:47:27,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:47:27,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-12-16 22:47:27,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353984615] [2021-12-16 22:47:27,755 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:27,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 22:47:27,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:27,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 22:47:27,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3639, Unknown=1, NotChecked=122, Total=4032 [2021-12-16 22:47:27,757 INFO L87 Difference]: Start difference. First operand 201 states and 211 transitions. Second operand has 35 states, 35 states have (on average 3.4) internal successors, (119), 35 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:33,356 INFO L93 Difference]: Finished difference Result 310 states and 331 transitions. [2021-12-16 22:47:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-16 22:47:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 35 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-16 22:47:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:33,357 INFO L225 Difference]: With dead ends: 310 [2021-12-16 22:47:33,358 INFO L226 Difference]: Without dead ends: 300 [2021-12-16 22:47:33,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4566 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1437, Invalid=15596, Unknown=1, NotChecked=258, Total=17292 [2021-12-16 22:47:33,360 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1378 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:33,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1378 Valid, 636 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 2101 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 22:47:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-16 22:47:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 227. [2021-12-16 22:47:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0619469026548674) internal successors, (240), 226 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 240 transitions. [2021-12-16 22:47:33,375 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 240 transitions. Word has length 119 [2021-12-16 22:47:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:33,375 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 240 transitions. [2021-12-16 22:47:33,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 35 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 240 transitions. [2021-12-16 22:47:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-16 22:47:33,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:33,376 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:33,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:33,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:33,588 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1572508701, now seen corresponding path program 14 times [2021-12-16 22:47:33,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:33,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335010290] [2021-12-16 22:47:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:33,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 24 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:35,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:35,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335010290] [2021-12-16 22:47:35,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335010290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:35,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354136096] [2021-12-16 22:47:35,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:47:35,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:35,274 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:47:35,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 22:47:35,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:47:35,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:35,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 22:47:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:35,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:35,739 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-16 22:47:35,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-16 22:47:35,807 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:47:35,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:47:35,828 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-12-16 22:47:35,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-12-16 22:47:36,473 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 19 treesize of output 7 [2021-12-16 22:47:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 116 proven. 212 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-16 22:47:36,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:39,124 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_342| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_342| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1551 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_342| 12) (- 4)) v_ArrVal_1551) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 32)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-16 22:47:47,075 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 41 treesize of output 39 [2021-12-16 22:47:47,079 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 6952 treesize of output 6888 [2021-12-16 22:49:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 116 proven. 209 refuted. 0 times theorem prover too weak. 66 trivial. 3 not checked. [2021-12-16 22:49:12,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354136096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:12,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:12,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18, 20] total 69 [2021-12-16 22:49:12,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606490806] [2021-12-16 22:49:12,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:12,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-16 22:49:12,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:12,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-16 22:49:12,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=4186, Unknown=13, NotChecked=132, Total=4692 [2021-12-16 22:49:12,104 INFO L87 Difference]: Start difference. First operand 227 states and 240 transitions. Second operand has 69 states, 69 states have (on average 4.318840579710145) internal successors, (298), 69 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:16,902 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (div c_~CELLCOUNT~0 3))) (let ((.cse5 (= |c_ULTIMATE.start_main_~MINVAL~0#1| 2)) (.cse0 (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3)) (.cse13 (= (* 3 .cse6) c_~CELLCOUNT~0)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (let ((.cse3 (<= 3 (select .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 40)))) (.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 12)) (.cse7 (or .cse13 (<= 0 c_~CELLCOUNT~0))) (.cse12 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse10 (< 4 .cse6)) (.cse8 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse9 (and .cse5 .cse0)) (.cse4 (< .cse6 4)) (.cse11 (<= .cse6 4))) (and (<= 2 c_~CELLCOUNT~0) (<= |c_ULTIMATE.start_main_~i~0#1| 3) .cse0 (<= (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4))) 0) .cse3 (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (or .cse4 (and .cse5 .cse3)) (= |c_ULTIMATE.start_main_~i~0#1| 3) (<= 4 .cse6) .cse7 (<= .cse6 .cse8) (or .cse9 .cse10) .cse11 .cse5 (< (select .cse1 (+ .cse12 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (or (and .cse5 (<= 3 (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (= (* 12 |c_ULTIMATE.start_main_~i~0#1|) 36)) (and (< .cse6 .cse8) .cse7) (< .cse6 |c_ULTIMATE.start_main_~i~0#1|)) (or (and (not .cse13) (< c_~CELLCOUNT~0 0) (<= |c_ULTIMATE.start_main_~i~0#1| .cse6)) (<= .cse8 .cse6)) (<= 3 (select .cse1 (+ .cse12 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28))) (or (and (or .cse9 (< |c_ULTIMATE.start_main_~i~0#1| 5)) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) .cse10) (forall ((|v_ULTIMATE.start_main_~i~0#1_342| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_342| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1551 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_342| 12) (- 4)) v_ArrVal_1551) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 32)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (or (< .cse8 .cse6) (and (or .cse9 .cse4) .cse11)))))) is different from false [2021-12-16 22:49:19,541 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 12)) (.cse4 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse5 (* 12 |c_ULTIMATE.start_main_~i~0#1|)) (.cse3 (= |c_ULTIMATE.start_main_~MINVAL~0#1| 2)) (.cse2 (div c_~CELLCOUNT~0 3)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (<= 3 (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)))) (< (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (or (< .cse2 4) (and .cse3 (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 40))))) (<= 4 .cse2) (<= .cse2 .cse4) (<= .cse2 4) .cse3 (or (and .cse3 (<= 3 (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (= .cse5 36)) (and (< .cse2 .cse4) (or (= (* 3 .cse2) c_~CELLCOUNT~0) (<= 0 c_~CELLCOUNT~0))) (< .cse2 |c_ULTIMATE.start_main_~i~0#1|)) (= 48 .cse5) (= |c_ULTIMATE.start_main_~i~0#1| 4) (or (and (or (and .cse3 (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3)) (< |c_ULTIMATE.start_main_~i~0#1| 5)) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) (< 4 .cse2)) (<= (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 32)) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_342| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_342| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1551 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_342| 12) (- 4)) v_ArrVal_1551) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 32)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2021-12-16 22:49:22,081 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (= |c_ULTIMATE.start_main_~MINVAL~0#1| 2)) (.cse0 (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3)) (.cse2 (div c_~CELLCOUNT~0 3))) (let ((.cse3 (= (* 3 .cse2) c_~CELLCOUNT~0)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse5 (< 4 .cse2)) (.cse8 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse4 (and .cse6 .cse0))) (and (<= 2 c_~CELLCOUNT~0) (<= |c_ULTIMATE.start_main_~i~0#1| 3) .cse0 (<= (select .cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4))) 0) (<= 3 (select .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 40))) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 3) (<= 4 .cse2) (or .cse3 (<= 0 c_~CELLCOUNT~0)) (or .cse4 .cse5) .cse6 (< (select .cse1 (+ .cse7 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (or (and (not .cse3) (< c_~CELLCOUNT~0 0) (<= |c_ULTIMATE.start_main_~i~0#1| .cse2)) (<= .cse8 .cse2)) (<= 3 (select .cse1 (+ .cse7 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28))) (or (and (or .cse4 (< |c_ULTIMATE.start_main_~i~0#1| 5)) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) .cse5) (forall ((|v_ULTIMATE.start_main_~i~0#1_342| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_342| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1551 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_342| 12) (- 4)) v_ArrVal_1551) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 32)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (or (< .cse8 .cse2) (and (or .cse4 (< .cse2 4)) (<= .cse2 4)))))) is different from false [2021-12-16 22:49:24,407 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_ULTIMATE.start_main_~MINVAL~0#1| 2)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse0 (div c_~CELLCOUNT~0 3))) (and (or (and (or (< .cse0 4) (and .cse1 (<= 3 (select .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 40))))) (<= .cse0 4)) (<= |c_ULTIMATE.start_main_~i~0#1| .cse0)) (<= 4 |c_ULTIMATE.start_main_~i~0#1|) (or (and (or (and .cse1 (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3)) (< |c_ULTIMATE.start_main_~i~0#1| 5)) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) (< 4 .cse0)) (<= (select .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 32)) 0) (<= 4 .cse0) (forall ((|v_ULTIMATE.start_main_~i~0#1_342| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_342| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1551 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_342| 12) (- 4)) v_ArrVal_1551) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 32)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2021-12-16 22:49:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:27,315 INFO L93 Difference]: Finished difference Result 463 states and 492 transitions. [2021-12-16 22:49:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-12-16 22:49:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 4.318840579710145) internal successors, (298), 69 states have internal predecessors, (298), 0 states have call successors, (0), 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 125 [2021-12-16 22:49:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:27,317 INFO L225 Difference]: With dead ends: 463 [2021-12-16 22:49:27,318 INFO L226 Difference]: Without dead ends: 447 [2021-12-16 22:49:27,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 9460 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=2199, Invalid=28956, Unknown=17, NotChecked=1770, Total=32942 [2021-12-16 22:49:27,322 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 779 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 4353 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 5265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 4353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:27,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 1650 Invalid, 5265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 4353 Invalid, 0 Unknown, 311 Unchecked, 2.0s Time] [2021-12-16 22:49:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-16 22:49:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 339. [2021-12-16 22:49:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.0502958579881656) internal successors, (355), 338 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 355 transitions. [2021-12-16 22:49:27,346 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 355 transitions. Word has length 125 [2021-12-16 22:49:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:27,347 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 355 transitions. [2021-12-16 22:49:27,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 4.318840579710145) internal successors, (298), 69 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 355 transitions. [2021-12-16 22:49:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-16 22:49:27,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:27,348 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:27,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 22:49:27,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:27,558 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:27,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1448368358, now seen corresponding path program 15 times [2021-12-16 22:49:27,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:27,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031866550] [2021-12-16 22:49:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:27,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:49:27,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:27,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031866550] [2021-12-16 22:49:27,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031866550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:27,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40360433] [2021-12-16 22:49:27,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:49:27,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:27,901 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:27,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 22:49:29,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-16 22:49:29,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-16 22:49:30,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:30,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:49:30,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-12-16 22:49:30,388 INFO L354 Elim1Store]: treesize reduction 312, result has 11.6 percent of original size [2021-12-16 22:49:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 111 treesize of output 104 [2021-12-16 22:49:30,421 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-12-16 22:49:30,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 40 [2021-12-16 22:49:30,472 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:49:30,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:49:30,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-12-16 22:49:30,535 INFO L354 Elim1Store]: treesize reduction 312, result has 11.6 percent of original size [2021-12-16 22:49:30,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 111 treesize of output 104 [2021-12-16 22:49:30,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:49:30,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:49:30,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:49:30,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 31 [2021-12-16 22:49:30,681 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:49:30,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:49:30,717 INFO L354 Elim1Store]: treesize reduction 153, result has 14.0 percent of original size [2021-12-16 22:49:30,717 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 46 treesize of output 40 [2021-12-16 22:49:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 27 proven. 255 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-16 22:49:31,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:32,204 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 33 treesize of output 31 [2021-12-16 22:49:32,207 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 1704 treesize of output 1672 [2021-12-16 22:49:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-16 22:49:33,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40360433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:33,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:33,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29, 29] total 53 [2021-12-16 22:49:33,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855267102] [2021-12-16 22:49:33,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:33,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-16 22:49:33,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-16 22:49:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 22:49:33,195 INFO L87 Difference]: Start difference. First operand 339 states and 355 transitions. Second operand has 53 states, 53 states have (on average 4.60377358490566) internal successors, (244), 53 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:37,213 INFO L93 Difference]: Finished difference Result 718 states and 754 transitions. [2021-12-16 22:49:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-16 22:49:37,213 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.60377358490566) internal successors, (244), 53 states have internal predecessors, (244), 0 states have call successors, (0), 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 125 [2021-12-16 22:49:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:37,215 INFO L225 Difference]: With dead ends: 718 [2021-12-16 22:49:37,215 INFO L226 Difference]: Without dead ends: 627 [2021-12-16 22:49:37,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 254 SyntacticMatches, 20 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9471 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2547, Invalid=25175, Unknown=0, NotChecked=0, Total=27722 [2021-12-16 22:49:37,218 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 913 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 2657 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 552 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:37,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [913 Valid, 557 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2657 Invalid, 0 Unknown, 552 Unchecked, 1.2s Time] [2021-12-16 22:49:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-12-16 22:49:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 436. [2021-12-16 22:49:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.0574712643678161) internal successors, (460), 435 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 460 transitions. [2021-12-16 22:49:37,251 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 460 transitions. Word has length 125 [2021-12-16 22:49:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:37,251 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 460 transitions. [2021-12-16 22:49:37,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.60377358490566) internal successors, (244), 53 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 460 transitions. [2021-12-16 22:49:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-16 22:49:37,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:37,253 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:37,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 22:49:37,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:37,479 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1299694546, now seen corresponding path program 16 times [2021-12-16 22:49:37,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:37,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101702024] [2021-12-16 22:49:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:37,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 22:49:37,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101702024] [2021-12-16 22:49:37,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101702024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951370227] [2021-12-16 22:49:37,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:49:37,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:37,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:37,800 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:37,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 22:49:37,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:49:37,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:37,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 22:49:37,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:38,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:49:38,098 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-12-16 22:49:38,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 31 [2021-12-16 22:49:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 402 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-16 22:49:38,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:38,828 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 17 treesize of output 15 [2021-12-16 22:49:38,830 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 30 treesize of output 26 [2021-12-16 22:49:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 402 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-16 22:49:38,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951370227] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:38,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:38,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2021-12-16 22:49:38,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119662026] [2021-12-16 22:49:38,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:38,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 22:49:38,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 22:49:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 22:49:38,907 INFO L87 Difference]: Start difference. First operand 436 states and 460 transitions. Second operand has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:41,896 INFO L93 Difference]: Finished difference Result 779 states and 839 transitions. [2021-12-16 22:49:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-16 22:49:41,897 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 0 states have call successors, (0), 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 131 [2021-12-16 22:49:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:41,900 INFO L225 Difference]: With dead ends: 779 [2021-12-16 22:49:41,900 INFO L226 Difference]: Without dead ends: 777 [2021-12-16 22:49:41,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7567 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1433, Invalid=19737, Unknown=0, NotChecked=0, Total=21170 [2021-12-16 22:49:41,903 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 524 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 3660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:41,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 725 Invalid, 3660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 3326 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 22:49:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-12-16 22:49:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 464. [2021-12-16 22:49:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.0647948164146868) internal successors, (493), 463 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 493 transitions. [2021-12-16 22:49:41,941 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 493 transitions. Word has length 131 [2021-12-16 22:49:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:41,941 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 493 transitions. [2021-12-16 22:49:41,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:49:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 493 transitions. [2021-12-16 22:49:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-16 22:49:41,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:41,943 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:41,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-16 22:49:42,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:42,164 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:42,164 INFO L85 PathProgramCache]: Analyzing trace with hash 231010641, now seen corresponding path program 17 times [2021-12-16 22:49:42,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:42,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748909745] [2021-12-16 22:49:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:42,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 15 proven. 58 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2021-12-16 22:49:42,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748909745] [2021-12-16 22:49:42,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748909745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797240632] [2021-12-16 22:49:42,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:49:42,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:42,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:42,444 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:49:42,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 22:49:51,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-16 22:49:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:51,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-16 22:49:51,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:51,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:49:51,272 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-16 22:49:51,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-16 22:49:51,304 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:49:51,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:49:51,323 INFO L354 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2021-12-16 22:49:51,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-12-16 22:49:51,355 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:49:51,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:49:51,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 40 [2021-12-16 22:49:51,392 INFO L354 Elim1Store]: treesize reduction 192, result has 13.1 percent of original size [2021-12-16 22:49:51,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 72 treesize of output 74 [2021-12-16 22:49:51,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-16 22:49:51,410 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-16 22:49:51,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 25 [2021-12-16 22:49:51,837 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 22:49:51,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2021-12-16 22:49:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 170 proven. 137 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-16 22:49:51,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:52,668 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 97 treesize of output 91 [2021-12-16 22:49:52,686 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 22:49:52,686 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 13759 treesize of output 13231 [2021-12-16 22:51:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 170 proven. 98 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-16 22:51:46,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797240632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:51:46,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:51:46,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 20] total 47 [2021-12-16 22:51:46,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842900215] [2021-12-16 22:51:46,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:51:46,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-16 22:51:46,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:51:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-16 22:51:46,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 22:51:46,047 INFO L87 Difference]: Start difference. First operand 464 states and 493 transitions. Second operand has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:49,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:51:49,642 INFO L93 Difference]: Finished difference Result 666 states and 708 transitions. [2021-12-16 22:51:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-16 22:51:49,643 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 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 133 [2021-12-16 22:51:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:51:49,645 INFO L225 Difference]: With dead ends: 666 [2021-12-16 22:51:49,645 INFO L226 Difference]: Without dead ends: 454 [2021-12-16 22:51:49,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 255 SyntacticMatches, 14 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3868 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1375, Invalid=10615, Unknown=0, NotChecked=0, Total=11990 [2021-12-16 22:51:49,647 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 471 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 2994 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:51:49,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 694 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2994 Invalid, 0 Unknown, 157 Unchecked, 1.3s Time] [2021-12-16 22:51:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-16 22:51:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 397. [2021-12-16 22:51:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.053030303030303) internal successors, (417), 396 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 417 transitions. [2021-12-16 22:51:49,679 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 417 transitions. Word has length 133 [2021-12-16 22:51:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:51:49,680 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 417 transitions. [2021-12-16 22:51:49,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 417 transitions. [2021-12-16 22:51:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-16 22:51:49,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:51:49,681 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:51:49,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 22:51:49,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:49,899 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:51:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:51:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2040887679, now seen corresponding path program 18 times [2021-12-16 22:51:49,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:51:49,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563920167] [2021-12-16 22:51:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:51:49,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:51:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 377 proven. 95 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-16 22:51:50,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:51:50,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563920167] [2021-12-16 22:51:50,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563920167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:51:50,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121345875] [2021-12-16 22:51:50,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:51:50,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:50,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:51:50,494 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:51:50,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 22:51:52,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-16 22:51:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:51:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 22:51:52,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:51:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 457 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-16 22:51:53,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:51:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 444 proven. 41 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-16 22:51:53,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121345875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:51:53,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:51:53,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 22] total 65 [2021-12-16 22:51:53,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175536598] [2021-12-16 22:51:53,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:51:53,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-16 22:51:53,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:51:53,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-16 22:51:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=3194, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 22:51:53,964 INFO L87 Difference]: Start difference. First operand 397 states and 417 transitions. Second operand has 65 states, 65 states have (on average 5.138461538461539) internal successors, (334), 65 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:51:54,704 INFO L93 Difference]: Finished difference Result 421 states and 443 transitions. [2021-12-16 22:51:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 22:51:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.138461538461539) internal successors, (334), 65 states have internal predecessors, (334), 0 states have call successors, (0), 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 137 [2021-12-16 22:51:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:51:54,705 INFO L225 Difference]: With dead ends: 421 [2021-12-16 22:51:54,706 INFO L226 Difference]: Without dead ends: 301 [2021-12-16 22:51:54,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1454, Invalid=4866, Unknown=0, NotChecked=0, Total=6320 [2021-12-16 22:51:54,707 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 749 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:51:54,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 464 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 22:51:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-16 22:51:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2021-12-16 22:51:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.0673400673400673) internal successors, (317), 297 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 317 transitions. [2021-12-16 22:51:54,732 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 317 transitions. Word has length 137 [2021-12-16 22:51:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:51:54,732 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 317 transitions. [2021-12-16 22:51:54,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.138461538461539) internal successors, (334), 65 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:51:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 317 transitions. [2021-12-16 22:51:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-16 22:51:54,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:51:54,733 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:51:54,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 22:51:54,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:54,947 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:51:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:51:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash -747932984, now seen corresponding path program 19 times [2021-12-16 22:51:54,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:51:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070580635] [2021-12-16 22:51:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:51:54,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:51:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:51:56,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:51:56,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070580635] [2021-12-16 22:51:56,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070580635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:51:56,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494244847] [2021-12-16 22:51:56,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:51:56,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:51:56,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:51:56,308 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:51:56,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 22:51:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:51:56,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-16 22:51:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:51:56,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:51:56,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:56,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:56,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:56,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:51:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 40 [2021-12-16 22:51:56,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:56,969 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 26 treesize of output 25 [2021-12-16 22:51:56,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:56,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:56,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:56,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:51:56,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2021-12-16 22:51:57,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:51:57,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,108 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 34 treesize of output 37 [2021-12-16 22:51:57,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,166 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 26 treesize of output 25 [2021-12-16 22:51:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:51:57,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2021-12-16 22:51:57,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,242 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 26 treesize of output 25 [2021-12-16 22:51:57,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,254 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 34 treesize of output 37 [2021-12-16 22:51:57,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,310 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 29 treesize of output 28 [2021-12-16 22:51:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,319 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 46 treesize of output 28 [2021-12-16 22:51:57,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,343 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 26 treesize of output 25 [2021-12-16 22:51:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:51:57,358 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 34 treesize of output 37 [2021-12-16 22:51:58,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:51:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:51:58,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:55:37,910 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 33 treesize of output 31 [2021-12-16 22:55:37,913 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 856 treesize of output 840 [2021-12-16 22:55:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 28 proven. 370 refuted. 2 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:55:39,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494244847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:55:39,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:55:39,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21, 27] total 79 [2021-12-16 22:55:39,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043605142] [2021-12-16 22:55:39,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:55:39,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-16 22:55:39,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:55:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-16 22:55:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=5701, Unknown=56, NotChecked=0, Total=6162 [2021-12-16 22:55:39,097 INFO L87 Difference]: Start difference. First operand 298 states and 317 transitions. Second operand has 79 states, 79 states have (on average 4.6455696202531644) internal successors, (367), 79 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:55:44,427 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse4 (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3)) (.cse5 (<= 5 |c_ULTIMATE.start_main_~i~0#1|)) (.cse3 (= |c_ULTIMATE.start_main_~MINVAL~0#1| 2)) (.cse6 (div c_~CELLCOUNT~0 3))) (and (<= 3 (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 16))) (<= 2 c_~CELLCOUNT~0) (let ((.cse2 (or (= (* 3 .cse6) c_~CELLCOUNT~0) (<= 0 c_~CELLCOUNT~0)))) (or (and (< 5 |c_ULTIMATE.start_main_~i~0#1|) .cse2) (< 6 |c_ULTIMATE.start_main_~i~0#1|) (and .cse3 .cse4 .cse2 .cse5))) .cse4 (<= 3 (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 40))) (<= 3 |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (= 0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) (forall ((|v_ULTIMATE.start_main_~i~0#1_527| Int)) (or (forall ((v_ArrVal_2470 Int) (v_ArrVal_2468 Int)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse7 (* |v_ULTIMATE.start_main_~i~0#1_527| 12))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse7 (- 8)) v_ArrVal_2470) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse7 (- 12)) v_ArrVal_2468)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 40)))) (< |v_ULTIMATE.start_main_~i~0#1_527| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (or (< 5 .cse6) (and .cse3 .cse4 (<= |c_ULTIMATE.start_main_~i~0#1| 5) .cse5)) .cse3 (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (<= 5 .cse6))) is different from false [2021-12-16 22:57:10,793 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse2 (= |c_ULTIMATE.start_main_~MINVAL~0#1| 2)) (.cse3 (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3)) (.cse4 (div c_~CELLCOUNT~0 3))) (and (<= 3 (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| 16))) (<= 2 c_~CELLCOUNT~0) (let ((.cse1 (or (= (* 3 .cse4) c_~CELLCOUNT~0) (<= 0 c_~CELLCOUNT~0)))) (or (and (< 5 |c_ULTIMATE.start_main_~i~0#1|) .cse1) (< 6 |c_ULTIMATE.start_main_~i~0#1|) (and .cse2 .cse3 .cse1 (<= 5 |c_ULTIMATE.start_main_~i~0#1|)))) .cse3 (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 40))) (<= 3 |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (= 0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) (forall ((|v_ULTIMATE.start_main_~i~0#1_527| Int)) (or (forall ((v_ArrVal_2470 Int) (v_ArrVal_2468 Int)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse5 (* |v_ULTIMATE.start_main_~i~0#1_527| 12))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (- 8)) v_ArrVal_2470) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (- 12)) v_ArrVal_2468)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 40)))) (< |v_ULTIMATE.start_main_~i~0#1_527| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (forall ((v_ArrVal_2470 Int) (v_ArrVal_2458 Int) (v_ArrVal_2457 Int) (v_ArrVal_2468 Int) (|v_ULTIMATE.start_main_~i~0#1_527| Int)) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse7 (* |v_ULTIMATE.start_main_~i~0#1_527| 12))) (store (store (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 12))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse6 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_2457) (+ .cse6 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12)) v_ArrVal_2458)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse7 (- 8)) v_ArrVal_2470) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse7 (- 12)) v_ArrVal_2468)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 40))) (< |v_ULTIMATE.start_main_~i~0#1_527| (+ |c_ULTIMATE.start_main_~i~0#1| 2)))) .cse2 (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (or (and .cse2 .cse3) (< 5 .cse4)) (<= 5 .cse4))) is different from false Killed by 15