./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-cav19/array_init_var_plus_ind2.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 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:08:27,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:08:27,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:08:27,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:08:27,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:08:27,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:08:27,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:08:27,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:08:27,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:08:27,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:08:27,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:08:27,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:08:27,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:08:27,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:08:27,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:08:27,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:08:27,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:08:27,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:08:27,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:08:27,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:08:27,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:08:27,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:08:27,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:08:27,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:08:27,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:08:27,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:08:27,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:08:27,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:08:27,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:08:27,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:08:27,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:08:27,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:08:27,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:08:27,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:08:27,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:08:27,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:08:27,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:08:27,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:08:27,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:08:27,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:08:27,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:08:27,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:08:27,498 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:08:27,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:08:27,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:08:27,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:08:27,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:08:27,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:08:27,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:08:27,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:08:27,503 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:08:27,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:08:27,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:08:27,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:08:27,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:08:27,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:08:27,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:08:27,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:08:27,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:08:27,505 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:08:27,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:08:27,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:08:27,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:08:27,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:08:27,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:08:27,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:08:27,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:08:27,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:08:27,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:08:27,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:08:27,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:08:27,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:08:27,508 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:08:27,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:08:27,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:08:27,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:08:27,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d [2021-12-21 10:08:27,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:08:27,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:08:27,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:08:27,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:08:27,772 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:08:27,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2021-12-21 10:08:27,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff91854aa/504b1ffafd1b4dc7be7f6c4a547a81a3/FLAG3d4a96753 [2021-12-21 10:08:28,243 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:08:28,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2021-12-21 10:08:28,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff91854aa/504b1ffafd1b4dc7be7f6c4a547a81a3/FLAG3d4a96753 [2021-12-21 10:08:28,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff91854aa/504b1ffafd1b4dc7be7f6c4a547a81a3 [2021-12-21 10:08:28,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:08:28,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:08:28,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:08:28,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:08:28,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:08:28,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5005cd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28, skipping insertion in model container [2021-12-21 10:08:28,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:08:28,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:08:28,825 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-cav19/array_init_var_plus_ind2.c[415,428] [2021-12-21 10:08:28,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:08:28,847 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:08:28,861 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-cav19/array_init_var_plus_ind2.c[415,428] [2021-12-21 10:08:28,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:08:28,883 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:08:28,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28 WrapperNode [2021-12-21 10:08:28,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:08:28,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:08:28,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:08:28,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:08:28,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,924 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-12-21 10:08:28,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:08:28,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:08:28,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:08:28,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:08:28,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:08:28,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:08:28,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:08:28,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:08:28,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (1/1) ... [2021-12-21 10:08:28,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:08:28,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:28,996 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) [2021-12-21 10:08:29,011 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 [2021-12-21 10:08:29,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:08:29,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:08:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:08:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:08:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:08:29,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:08:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:08:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:08:29,085 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:08:29,086 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:08:29,211 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:08:29,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:08:29,216 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 10:08:29,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:08:29 BoogieIcfgContainer [2021-12-21 10:08:29,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:08:29,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:08:29,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:08:29,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:08:29,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:08:28" (1/3) ... [2021-12-21 10:08:29,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155414d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:08:29, skipping insertion in model container [2021-12-21 10:08:29,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:28" (2/3) ... [2021-12-21 10:08:29,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155414d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:08:29, skipping insertion in model container [2021-12-21 10:08:29,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:08:29" (3/3) ... [2021-12-21 10:08:29,229 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2021-12-21 10:08:29,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:08:29,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:08:29,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:08:29,293 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 [2021-12-21 10:08:29,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:08:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 10:08:29,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:29,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:29,320 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:29,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2021-12-21 10:08:29,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:29,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551346696] [2021-12-21 10:08:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:29,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:29,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:29,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551346696] [2021-12-21 10:08:29,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551346696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:08:29,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:08:29,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:08:29,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871132056] [2021-12-21 10:08:29,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:08:29,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:08:29,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:29,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:08:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:08:29,565 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:29,575 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-12-21 10:08:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:08:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 10:08:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:29,583 INFO L225 Difference]: With dead ends: 27 [2021-12-21 10:08:29,583 INFO L226 Difference]: Without dead ends: 12 [2021-12-21 10:08:29,585 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 [2021-12-21 10:08:29,605 INFO L933 BasicCegarLoop]: 18 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, 18 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 [2021-12-21 10:08:29,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:08:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-21 10:08:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-21 10:08:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-21 10:08:29,633 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-12-21 10:08:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:29,633 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-21 10:08:29,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-21 10:08:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 10:08:29,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:29,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:29,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:08:29,636 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2021-12-21 10:08:29,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:29,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595536840] [2021-12-21 10:08:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:29,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:29,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595536840] [2021-12-21 10:08:29,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595536840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:08:29,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:08:29,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:08:29,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059091956] [2021-12-21 10:08:29,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:08:29,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:08:29,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:29,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:08:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:08:29,747 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:29,785 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-21 10:08:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:08:29,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 10:08:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:29,787 INFO L225 Difference]: With dead ends: 29 [2021-12-21 10:08:29,787 INFO L226 Difference]: Without dead ends: 22 [2021-12-21 10:08:29,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:08:29,789 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:29,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:08:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-21 10:08:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2021-12-21 10:08:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-21 10:08:29,794 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-12-21 10:08:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:29,794 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-21 10:08:29,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-21 10:08:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 10:08:29,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:29,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:29,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:08:29,796 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:29,796 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2021-12-21 10:08:29,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:29,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353068048] [2021-12-21 10:08:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:29,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:29,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:29,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353068048] [2021-12-21 10:08:29,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353068048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:08:29,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:08:29,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:08:29,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024863985] [2021-12-21 10:08:29,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:08:29,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:08:29,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:08:29,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:08:29,847 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:29,877 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-21 10:08:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:08:29,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 10:08:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:29,880 INFO L225 Difference]: With dead ends: 23 [2021-12-21 10:08:29,880 INFO L226 Difference]: Without dead ends: 15 [2021-12-21 10:08:29,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:08:29,887 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:29,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:08:29,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-21 10:08:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-21 10:08:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-21 10:08:29,895 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-21 10:08:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:29,896 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-21 10:08:29,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-21 10:08:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 10:08:29,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:29,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:29,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:08:29,898 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:29,899 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2021-12-21 10:08:29,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472610927] [2021-12-21 10:08:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:29,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:29,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:29,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472610927] [2021-12-21 10:08:29,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472610927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:30,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359450984] [2021-12-21 10:08:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:30,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:30,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:30,007 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) [2021-12-21 10:08:30,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:08:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:08:30,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:30,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:30,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359450984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:30,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:30,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2021-12-21 10:08:30,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54111502] [2021-12-21 10:08:30,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:30,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:08:30,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:08:30,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:08:30,265 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:30,349 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-21 10:08:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:08:30,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 10:08:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:30,351 INFO L225 Difference]: With dead ends: 45 [2021-12-21 10:08:30,351 INFO L226 Difference]: Without dead ends: 36 [2021-12-21 10:08:30,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:08:30,358 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:30,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:08:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-21 10:08:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-12-21 10:08:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-21 10:08:30,369 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2021-12-21 10:08:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:30,369 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-21 10:08:30,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-21 10:08:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 10:08:30,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:30,371 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:30,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:30,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:30,588 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2021-12-21 10:08:30,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:30,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940166048] [2021-12-21 10:08:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:30,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:30,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:30,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940166048] [2021-12-21 10:08:30,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940166048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:30,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129786784] [2021-12-21 10:08:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:30,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:30,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:30,732 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) [2021-12-21 10:08:30,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:08:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:30,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 10:08:30,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:30,936 INFO L387 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 13 treesize of output 9 [2021-12-21 10:08:31,052 INFO L387 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 [2021-12-21 10:08:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:31,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:31,157 INFO L387 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 18 treesize of output 16 [2021-12-21 10:08:31,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-21 10:08:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:31,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129786784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:31,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:31,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2021-12-21 10:08:31,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321763615] [2021-12-21 10:08:31,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:31,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 10:08:31,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:31,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 10:08:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:08:31,296 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:31,451 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-12-21 10:08:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:08:31,452 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-21 10:08:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:31,452 INFO L225 Difference]: With dead ends: 37 [2021-12-21 10:08:31,452 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 10:08:31,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-12-21 10:08:31,453 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:31,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 113 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2021-12-21 10:08:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 10:08:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-12-21 10:08:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-21 10:08:31,458 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2021-12-21 10:08:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:31,458 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-21 10:08:31,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-21 10:08:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 10:08:31,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:31,460 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:31,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:31,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:31,680 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2021-12-21 10:08:31,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:31,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920078939] [2021-12-21 10:08:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:31,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:31,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920078939] [2021-12-21 10:08:31,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920078939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132648601] [2021-12-21 10:08:31,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:08:31,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:31,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:31,902 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) [2021-12-21 10:08:31,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:08:31,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:08:31,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:31,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 10:08:31,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:32,047 INFO L387 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 15 treesize of output 11 [2021-12-21 10:08:32,129 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:08:32,129 INFO L387 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 25 treesize of output 24 [2021-12-21 10:08:32,201 INFO L387 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 [2021-12-21 10:08:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:32,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:44,432 INFO L387 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 26 treesize of output 24 [2021-12-21 10:08:44,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 90 [2021-12-21 10:08:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:44,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132648601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:44,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:44,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-21 10:08:44,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306966846] [2021-12-21 10:08:44,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:44,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 10:08:44,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:44,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 10:08:44,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=428, Unknown=5, NotChecked=0, Total=506 [2021-12-21 10:08:44,625 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-12-21 10:08:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:45,042 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-12-21 10:08:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 10:08:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) Word has length 17 [2021-12-21 10:08:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:45,043 INFO L225 Difference]: With dead ends: 50 [2021-12-21 10:08:45,043 INFO L226 Difference]: Without dead ends: 48 [2021-12-21 10:08:45,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=152, Invalid=835, Unknown=5, NotChecked=0, Total=992 [2021-12-21 10:08:45,044 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:45,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 140 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 171 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2021-12-21 10:08:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-21 10:08:45,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2021-12-21 10:08:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-21 10:08:45,048 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-21 10:08:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:45,048 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-21 10:08:45,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-12-21 10:08:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-21 10:08:45,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 10:08:45,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:45,049 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:45,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:45,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:45,258 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:45,258 INFO L85 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2021-12-21 10:08:45,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:45,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804177570] [2021-12-21 10:08:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:45,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:45,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804177570] [2021-12-21 10:08:45,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804177570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:45,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511029042] [2021-12-21 10:08:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:45,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:45,321 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) [2021-12-21 10:08:45,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:08:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:45,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:08:45,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:45,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:45,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511029042] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:45,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:45,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 10:08:45,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143389745] [2021-12-21 10:08:45,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:45,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:08:45,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:08:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:08:45,503 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:45,547 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-12-21 10:08:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:08:45,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 10:08:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:45,548 INFO L225 Difference]: With dead ends: 38 [2021-12-21 10:08:45,548 INFO L226 Difference]: Without dead ends: 26 [2021-12-21 10:08:45,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:08:45,549 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:45,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 55 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:08:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-21 10:08:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-21 10:08:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2021-12-21 10:08:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-21 10:08:45,558 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-12-21 10:08:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:45,558 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-21 10:08:45,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-21 10:08:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 10:08:45,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:45,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:45,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 10:08:45,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:45,777 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:45,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1429725775, now seen corresponding path program 2 times [2021-12-21 10:08:45,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:45,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965555754] [2021-12-21 10:08:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:45,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:45,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965555754] [2021-12-21 10:08:45,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965555754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394133485] [2021-12-21 10:08:45,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:08:45,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:45,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:45,852 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) [2021-12-21 10:08:45,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:08:45,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:08:45,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:45,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 10:08:45,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:46,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:46,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394133485] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:46,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:46,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2021-12-21 10:08:46,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173991986] [2021-12-21 10:08:46,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:46,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 10:08:46,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 10:08:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2021-12-21 10:08:46,140 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:46,317 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-21 10:08:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:08:46,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 10:08:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:46,321 INFO L225 Difference]: With dead ends: 98 [2021-12-21 10:08:46,321 INFO L226 Difference]: Without dead ends: 91 [2021-12-21 10:08:46,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2021-12-21 10:08:46,322 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 264 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:46,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 99 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:08:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-21 10:08:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 43. [2021-12-21 10:08:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-21 10:08:46,342 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 19 [2021-12-21 10:08:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:46,342 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-21 10:08:46,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-21 10:08:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 10:08:46,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:46,343 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:46,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:46,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:46,567 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1421454960, now seen corresponding path program 3 times [2021-12-21 10:08:46,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:46,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559866476] [2021-12-21 10:08:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:46,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:46,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:46,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559866476] [2021-12-21 10:08:46,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559866476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:46,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990062184] [2021-12-21 10:08:46,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:08:46,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:46,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:46,750 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) [2021-12-21 10:08:46,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:08:46,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 10:08:46,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 10:08:46,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:46,912 INFO L387 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 15 treesize of output 11 [2021-12-21 10:08:46,989 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:08:46,990 INFO L387 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 25 treesize of output 24 [2021-12-21 10:08:47,095 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:08:47,096 INFO L387 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 25 treesize of output 24 [2021-12-21 10:08:47,186 INFO L387 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 [2021-12-21 10:08:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:47,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:09:24,988 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (forall ((v_ArrVal_104 Int) (|v_ULTIMATE.start_main_~i~0#1_42| Int) (v_ArrVal_105 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_43| 1) |v_ULTIMATE.start_main_~i~0#1_42|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~i~0#1_42| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4)) v_ArrVal_104) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_42| 4)) v_ArrVal_105) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_43|)))) is different from false [2021-12-21 10:09:25,022 INFO L387 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 34 treesize of output 32 [2021-12-21 10:09:25,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 210 [2021-12-21 10:09:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-21 10:09:25,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990062184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:25,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:25,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-21 10:09:25,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998814629] [2021-12-21 10:09:25,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:25,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 10:09:25,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 10:09:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=626, Unknown=27, NotChecked=52, Total=812 [2021-12-21 10:09:25,337 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:27,380 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1|) 0) (<= 0 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (forall ((v_ArrVal_104 Int) (|v_ULTIMATE.start_main_~i~0#1_42| Int) (v_ArrVal_105 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_43| 1) |v_ULTIMATE.start_main_~i~0#1_42|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~i~0#1_42| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4)) v_ArrVal_104) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_42| 4)) v_ArrVal_105) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_43|)))) (<= |c_ULTIMATE.start_main_~k~0#1| 0) (= (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|) 0) (<= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|)))) is different from false [2021-12-21 10:09:27,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:27,688 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-12-21 10:09:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 10:09:27,689 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 10:09:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:27,691 INFO L225 Difference]: With dead ends: 59 [2021-12-21 10:09:27,691 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 10:09:27,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=271, Invalid=1115, Unknown=28, NotChecked=146, Total=1560 [2021-12-21 10:09:27,692 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:27,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 127 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 247 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2021-12-21 10:09:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 10:09:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2021-12-21 10:09:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 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) [2021-12-21 10:09:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-21 10:09:27,698 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 20 [2021-12-21 10:09:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:27,699 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-21 10:09:27,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-21 10:09:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 10:09:27,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:27,700 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:27,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:09:27,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:27,915 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2021-12-21 10:09:27,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:27,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627163187] [2021-12-21 10:09:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:27,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:28,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:28,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627163187] [2021-12-21 10:09:28,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627163187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:28,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734832079] [2021-12-21 10:09:28,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:09:28,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:28,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:28,130 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) [2021-12-21 10:09:28,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:09:28,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:09:28,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:09:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 10:09:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:09:28,351 INFO L387 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 15 treesize of output 11 [2021-12-21 10:09:28,541 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-21 10:09:28,541 INFO L387 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 21 treesize of output 10 [2021-12-21 10:09:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:28,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:09:28,793 INFO L387 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 20 treesize of output 18 [2021-12-21 10:09:28,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-12-21 10:09:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:29,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734832079] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:29,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:29,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-21 10:09:29,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861245016] [2021-12-21 10:09:29,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:29,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 10:09:29,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 10:09:29,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-12-21 10:09:29,061 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:29,286 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-12-21 10:09:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:09:29,287 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-21 10:09:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:29,287 INFO L225 Difference]: With dead ends: 54 [2021-12-21 10:09:29,288 INFO L226 Difference]: Without dead ends: 42 [2021-12-21 10:09:29,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 10:09:29,289 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:29,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2021-12-21 10:09:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-21 10:09:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-21 10:09:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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) [2021-12-21 10:09:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-21 10:09:29,294 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2021-12-21 10:09:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:29,295 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-21 10:09:29,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-21 10:09:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 10:09:29,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:29,296 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:29,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:09:29,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:29,508 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:29,508 INFO L85 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2021-12-21 10:09:29,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:29,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459284487] [2021-12-21 10:09:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:29,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:29,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:29,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459284487] [2021-12-21 10:09:29,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459284487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:29,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301705703] [2021-12-21 10:09:29,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:09:29,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:29,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:29,713 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) [2021-12-21 10:09:29,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:09:29,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 10:09:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:09:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 10:09:29,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:09:29,936 INFO L387 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 15 treesize of output 11 [2021-12-21 10:09:30,010 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 10:09:30,011 INFO L387 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 23 treesize of output 22 [2021-12-21 10:09:30,137 INFO L387 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 [2021-12-21 10:09:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:30,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:09:30,338 INFO L387 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 29 treesize of output 27 [2021-12-21 10:09:30,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 224 [2021-12-21 10:09:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:30,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301705703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:30,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:30,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2021-12-21 10:09:30,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369632466] [2021-12-21 10:09:30,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:30,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 10:09:30,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 10:09:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-12-21 10:09:30,617 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:09:30,949 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-12-21 10:09:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 10:09:30,949 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 10:09:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:09:30,950 INFO L225 Difference]: With dead ends: 60 [2021-12-21 10:09:30,950 INFO L226 Difference]: Without dead ends: 58 [2021-12-21 10:09:30,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 10:09:30,951 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:09:30,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 185 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 337 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2021-12-21 10:09:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-21 10:09:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-12-21 10:09:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-21 10:09:30,960 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2021-12-21 10:09:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:09:30,962 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-21 10:09:30,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:09:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-21 10:09:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:09:30,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:09:30,964 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:09:30,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 10:09:31,167 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,SelfDestructingSolverStorable10 [2021-12-21 10:09:31,168 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:09:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:09:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 4 times [2021-12-21 10:09:31,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:09:31,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700649777] [2021-12-21 10:09:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:09:31,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:09:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:09:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:31,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:09:31,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700649777] [2021-12-21 10:09:31,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700649777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:09:31,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837190778] [2021-12-21 10:09:31,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:09:31,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:09:31,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:09:31,388 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) [2021-12-21 10:09:31,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:09:31,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:09:31,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:09:31,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 10:09:31,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:09:31,613 INFO L387 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 15 treesize of output 11 [2021-12-21 10:09:31,692 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:09:31,692 INFO L387 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 25 treesize of output 24 [2021-12-21 10:09:31,769 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:09:31,769 INFO L387 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 25 treesize of output 24 [2021-12-21 10:09:31,910 INFO L387 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 [2021-12-21 10:09:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:09:31,947 INFO L328 TraceCheckSpWp]: Computing backward predicates...