./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/verifythis/prefixsum_iter.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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:16:55,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:16:55,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:16:55,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:16:55,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:16:55,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:16:55,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:16:55,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:16:55,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:16:55,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:16:55,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:16:55,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:16:55,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:16:55,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:16:55,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:16:55,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:16:55,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:16:55,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:16:55,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:16:55,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:16:55,509 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:16:55,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:16:55,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:16:55,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:16:55,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:16:55,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:16:55,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:16:55,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:16:55,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:16:55,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:16:55,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:16:55,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:16:55,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:16:55,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:16:55,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:16:55,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:16:55,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:16:55,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:16:55,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:16:55,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:16:55,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:16:55,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:16:55,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:16:55,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:16:55,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:16:55,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:16:55,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:16:55,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:16:55,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:16:55,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:16:55,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:16:55,554 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:16:55,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:16:55,555 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:16:55,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:16:55,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:16:55,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:16:55,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:16:55,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:16:55,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:16:55,556 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:16:55,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:16:55,556 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:16:55,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:16:55,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:16:55,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:16:55,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:16:55,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:16:55,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:16:55,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:16:55,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:16:55,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:16:55,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:16:55,557 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:16:55,558 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:16:55,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:16:55,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-07-12 04:16:55,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:16:55,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:16:55,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:16:55,859 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:16:55,860 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:16:55,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-07-12 04:16:55,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/234d94d35/b277a5fb15f148b990a81108d5a3dc5a/FLAG05e3b5a8c [2022-07-12 04:16:56,330 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:16:56,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-07-12 04:16:56,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/234d94d35/b277a5fb15f148b990a81108d5a3dc5a/FLAG05e3b5a8c [2022-07-12 04:16:56,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/234d94d35/b277a5fb15f148b990a81108d5a3dc5a [2022-07-12 04:16:56,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:16:56,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:16:56,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:16:56,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:16:56,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:16:56,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a0230f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56, skipping insertion in model container [2022-07-12 04:16:56,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:16:56,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:16:56,574 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/verifythis/prefixsum_iter.c[526,539] [2022-07-12 04:16:56,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:16:56,633 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:16:56,649 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/verifythis/prefixsum_iter.c[526,539] [2022-07-12 04:16:56,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:16:56,673 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:16:56,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56 WrapperNode [2022-07-12 04:16:56,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:16:56,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:16:56,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:16:56,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:16:56,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,727 INFO L137 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 125 [2022-07-12 04:16:56,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:16:56,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:16:56,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:16:56,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:16:56,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:16:56,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:16:56,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:16:56,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:16:56,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (1/1) ... [2022-07-12 04:16:56,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:16:56,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:56,778 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) [2022-07-12 04:16:56,783 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 [2022-07-12 04:16:56,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:16:56,812 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 04:16:56,812 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 04:16:56,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:16:56,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 04:16:56,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 04:16:56,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:16:56,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:16:56,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 04:16:56,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-07-12 04:16:56,813 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-07-12 04:16:56,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 04:16:56,940 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:16:56,941 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:16:57,230 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:16:57,235 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:16:57,242 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-12 04:16:57,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:16:57 BoogieIcfgContainer [2022-07-12 04:16:57,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:16:57,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:16:57,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:16:57,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:16:57,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:16:56" (1/3) ... [2022-07-12 04:16:57,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ed142e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:16:57, skipping insertion in model container [2022-07-12 04:16:57,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:16:56" (2/3) ... [2022-07-12 04:16:57,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ed142e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:16:57, skipping insertion in model container [2022-07-12 04:16:57,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:16:57" (3/3) ... [2022-07-12 04:16:57,255 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-07-12 04:16:57,267 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:16:57,267 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:16:57,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:16:57,333 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@30665131, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3914bbe0 [2022-07-12 04:16:57,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:16:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 04:16:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 04:16:57,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:57,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:57,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:57,353 INFO L85 PathProgramCache]: Analyzing trace with hash -750888739, now seen corresponding path program 1 times [2022-07-12 04:16:57,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:57,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882087326] [2022-07-12 04:16:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:16:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:16:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:16:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:16:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:16:57,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:57,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882087326] [2022-07-12 04:16:57,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882087326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:16:57,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:16:57,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:16:57,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353245104] [2022-07-12 04:16:57,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:16:57,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 04:16:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 04:16:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:16:57,638 INFO L87 Difference]: Start difference. First operand has 42 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:16:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:57,715 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2022-07-12 04:16:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 04:16:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-07-12 04:16:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:57,723 INFO L225 Difference]: With dead ends: 81 [2022-07-12 04:16:57,723 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 04:16:57,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:16:57,730 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:57,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:16:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 04:16:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-12 04:16:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 04:16:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-07-12 04:16:57,770 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2022-07-12 04:16:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:57,770 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-07-12 04:16:57,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:16:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-07-12 04:16:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 04:16:57,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:57,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:57,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:16:57,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash 221792227, now seen corresponding path program 1 times [2022-07-12 04:16:57,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:57,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482245588] [2022-07-12 04:16:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:57,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:16:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:16:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:16:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:16:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:16:57,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:57,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482245588] [2022-07-12 04:16:57,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482245588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:16:58,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:16:58,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 04:16:58,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316769876] [2022-07-12 04:16:58,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:16:58,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 04:16:58,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:58,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 04:16:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:16:58,003 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:00,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:17:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:00,443 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2022-07-12 04:17:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 04:17:00,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-07-12 04:17:00,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:00,446 INFO L225 Difference]: With dead ends: 97 [2022-07-12 04:17:00,446 INFO L226 Difference]: Without dead ends: 69 [2022-07-12 04:17:00,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:17:00,447 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 72 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:00,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 259 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-12 04:17:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-12 04:17:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2022-07-12 04:17:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 04:17:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-07-12 04:17:00,462 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 37 [2022-07-12 04:17:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:00,463 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-07-12 04:17:00,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-07-12 04:17:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 04:17:00,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:00,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:00,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 04:17:00,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash 747513669, now seen corresponding path program 1 times [2022-07-12 04:17:00,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:00,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740250017] [2022-07-12 04:17:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:00,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:00,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:17:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:00,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:17:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:00,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:17:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:00,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:17:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:17:00,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:00,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740250017] [2022-07-12 04:17:00,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740250017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750898436] [2022-07-12 04:17:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:00,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:00,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:00,819 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) [2022-07-12 04:17:00,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:17:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 04:17:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:00,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 04:17:01,040 INFO L390 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 7 treesize of output 6 [2022-07-12 04:17:01,137 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 04:17:01,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 04:17:01,162 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_45 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_45))) is different from true [2022-07-12 04:17:01,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-12 04:17:01,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-12 04:17:01,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-07-12 04:17:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2022-07-12 04:17:01,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:24,147 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_check_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_4| Int) (|v_ULTIMATE.start_downsweep_~n#1_5| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_4| (* |v_ULTIMATE.start_downsweep_~n#1_5| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2022-07-12 04:17:24,211 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_check_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_4| Int) (|v_ULTIMATE.start_downsweep_~n#1_5| Int) (v_ArrVal_46 (Array Int Int)) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| v_ArrVal_46) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_4| (* |v_ULTIMATE.start_downsweep_~n#1_5| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2022-07-12 04:17:24,225 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_check_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_4| Int) (|v_ULTIMATE.start_downsweep_~n#1_5| Int) (v_ArrVal_46 (Array Int Int)) (|ULTIMATE.start_check_~i~0#1| Int)) (= 0 (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_46) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_4| (* |v_ULTIMATE.start_downsweep_~n#1_5| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))) is different from false [2022-07-12 04:17:24,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750898436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:24,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:17:24,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 17 [2022-07-12 04:17:24,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092174056] [2022-07-12 04:17:24,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:24,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 04:17:24,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:24,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 04:17:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=251, Unknown=15, NotChecked=140, Total=462 [2022-07-12 04:17:24,257 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 04:17:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:34,576 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-07-12 04:17:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 04:17:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2022-07-12 04:17:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:34,578 INFO L225 Difference]: With dead ends: 49 [2022-07-12 04:17:34,578 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 04:17:34,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=129, Invalid=569, Unknown=20, NotChecked=212, Total=930 [2022-07-12 04:17:34,579 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:34,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 232 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 139 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-07-12 04:17:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 04:17:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-07-12 04:17:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 04:17:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-07-12 04:17:34,593 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 39 [2022-07-12 04:17:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:34,594 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-07-12 04:17:34,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 04:17:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-07-12 04:17:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:17:34,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:34,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:34,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:17:34,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:34,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1715230204, now seen corresponding path program 1 times [2022-07-12 04:17:34,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:34,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621823519] [2022-07-12 04:17:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:34,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:34,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:17:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:34,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:17:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:34,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:17:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:34,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:17:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:17:34,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:34,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621823519] [2022-07-12 04:17:34,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621823519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:34,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138138723] [2022-07-12 04:17:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:34,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:34,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:34,942 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) [2022-07-12 04:17:34,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:17:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:35,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 04:17:35,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:17:35,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:17:35,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138138723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:17:35,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:17:35,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-07-12 04:17:35,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033957925] [2022-07-12 04:17:35,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:35,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 04:17:35,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 04:17:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:17:35,174 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:37,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:17:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:37,590 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2022-07-12 04:17:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 04:17:37,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-07-12 04:17:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:37,592 INFO L225 Difference]: With dead ends: 116 [2022-07-12 04:17:37,592 INFO L226 Difference]: Without dead ends: 80 [2022-07-12 04:17:37,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-07-12 04:17:37,593 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 115 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:37,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 179 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-12 04:17:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-12 04:17:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2022-07-12 04:17:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 04:17:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-12 04:17:37,601 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 43 [2022-07-12 04:17:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:37,602 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-12 04:17:37,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-12 04:17:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 04:17:37,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:37,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:37,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:17:37,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 04:17:37,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1080974370, now seen corresponding path program 2 times [2022-07-12 04:17:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736105315] [2022-07-12 04:17:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:37,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:17:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:37,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:17:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:37,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:17:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:37,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:17:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 04:17:37,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:37,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736105315] [2022-07-12 04:17:37,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736105315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:37,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643642635] [2022-07-12 04:17:37,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:17:37,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:37,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:37,936 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) [2022-07-12 04:17:37,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:17:38,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:17:38,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:17:38,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:17:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:17:38,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:17:38,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643642635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:17:38,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:17:38,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-07-12 04:17:38,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493053445] [2022-07-12 04:17:38,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:17:38,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 04:17:38,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 04:17:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:17:38,109 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:38,241 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-07-12 04:17:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:17:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2022-07-12 04:17:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:38,243 INFO L225 Difference]: With dead ends: 66 [2022-07-12 04:17:38,243 INFO L226 Difference]: Without dead ends: 49 [2022-07-12 04:17:38,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-12 04:17:38,244 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:38,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 129 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:17:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-12 04:17:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-07-12 04:17:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 04:17:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-12 04:17:38,254 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 45 [2022-07-12 04:17:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:38,255 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-12 04:17:38,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-12 04:17:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 04:17:38,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:38,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:38,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:17:38,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:38,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1924122647, now seen corresponding path program 1 times [2022-07-12 04:17:38,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:38,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887207477] [2022-07-12 04:17:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:38,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:17:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:17:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:17:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:17:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 04:17:38,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:38,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887207477] [2022-07-12 04:17:38,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887207477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:17:38,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:17:38,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 04:17:38,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501493885] [2022-07-12 04:17:38,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:17:38,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:17:38,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:38,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:17:38,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:17:38,549 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:38,588 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-07-12 04:17:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:17:38,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-07-12 04:17:38,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:38,589 INFO L225 Difference]: With dead ends: 65 [2022-07-12 04:17:38,590 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 04:17:38,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:17:38,591 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:38,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:17:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 04:17:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-12 04:17:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 04:17:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-12 04:17:38,597 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 48 [2022-07-12 04:17:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:38,598 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-12 04:17:38,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-12 04:17:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 04:17:38,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:38,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:38,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 04:17:38,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:38,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:38,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1397539149, now seen corresponding path program 1 times [2022-07-12 04:17:38,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:38,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048855972] [2022-07-12 04:17:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:38,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:17:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:17:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:17:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:17:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:17:38,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:38,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048855972] [2022-07-12 04:17:38,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048855972] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:38,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250417103] [2022-07-12 04:17:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:38,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:38,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:38,748 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) [2022-07-12 04:17:38,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:17:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:38,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:17:38,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:17:38,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:17:38,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250417103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:17:38,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:17:38,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 12 [2022-07-12 04:17:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498031658] [2022-07-12 04:17:38,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:17:38,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 04:17:38,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:38,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 04:17:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:17:38,906 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:38,968 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-07-12 04:17:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:17:38,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-07-12 04:17:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:38,970 INFO L225 Difference]: With dead ends: 61 [2022-07-12 04:17:38,970 INFO L226 Difference]: Without dead ends: 52 [2022-07-12 04:17:38,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:17:38,971 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:38,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:17:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-12 04:17:38,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-07-12 04:17:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 04:17:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-07-12 04:17:38,977 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 49 [2022-07-12 04:17:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:38,978 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-07-12 04:17:38,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:38,978 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-07-12 04:17:38,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 04:17:38,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:38,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:39,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:17:39,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:39,199 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:39,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1418623757, now seen corresponding path program 1 times [2022-07-12 04:17:39,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:39,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568451375] [2022-07-12 04:17:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:39,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:39,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:17:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:39,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:17:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:39,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:17:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:39,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:17:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:17:39,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:39,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568451375] [2022-07-12 04:17:39,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568451375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:39,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224893136] [2022-07-12 04:17:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:39,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:39,362 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) [2022-07-12 04:17:39,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:17:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 04:17:39,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:17:39,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:17:39,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224893136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:17:39,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:17:39,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2022-07-12 04:17:39,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770269979] [2022-07-12 04:17:39,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:39,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:17:39,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:17:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:17:39,716 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:41,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:17:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:42,368 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2022-07-12 04:17:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 04:17:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2022-07-12 04:17:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:42,369 INFO L225 Difference]: With dead ends: 99 [2022-07-12 04:17:42,369 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 04:17:42,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2022-07-12 04:17:42,370 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 101 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:42,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 322 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 355 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-12 04:17:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 04:17:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 51. [2022-07-12 04:17:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 04:17:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-12 04:17:42,379 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 52 [2022-07-12 04:17:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:42,380 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-12 04:17:42,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:17:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-12 04:17:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 04:17:42,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:42,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:42,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:17:42,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:42,604 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:42,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash -282483074, now seen corresponding path program 1 times [2022-07-12 04:17:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:42,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387123135] [2022-07-12 04:17:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:42,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:42,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:17:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:42,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:17:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:42,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:17:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:42,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:17:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 04:17:42,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387123135] [2022-07-12 04:17:42,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387123135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675527013] [2022-07-12 04:17:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:42,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:42,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:42,855 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) [2022-07-12 04:17:42,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:17:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:42,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 118 conjunts are in the unsatisfiable core [2022-07-12 04:17:42,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:42,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 04:17:43,000 INFO L390 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 7 treesize of output 6 [2022-07-12 04:17:43,067 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 04:17:43,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 04:17:43,098 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_212 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_212) |c_#memory_int|)) is different from true [2022-07-12 04:17:43,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-12 04:17:43,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-07-12 04:17:43,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-07-12 04:17:43,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-07-12 04:17:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 04:17:43,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-12 04:17:43,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2022-07-12 04:17:43,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2022-07-12 04:17:45,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2022-07-12 04:17:51,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 193 [2022-07-12 04:17:51,909 INFO L390 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 173 treesize of output 167 [2022-07-12 04:17:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2022-07-12 04:17:51,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:19:01,420 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~n~0#1| Int)) (or (forall ((|ULTIMATE.start_upsweep_~left~0#1| Int) (v_ArrVal_220 Int) (|v_ULTIMATE.start_upsweep_~right~0#1_7| Int) (|ULTIMATE.start_upsweep_~a#1.offset| Int) (v_ArrVal_215 Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_215)))) (let ((.cse3 (store (let ((.cse5 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_7| 4) |ULTIMATE.start_upsweep_~a#1.offset|))) (store .cse5 .cse6 (+ (select .cse5 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (select .cse5 .cse6)))) (+ (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_220)) (.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse1 (select .cse3 .cse4))) (or (let ((.cse0 (+ (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse1))) (= .cse0 (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse3 .cse4 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) |c_ULTIMATE.start_main_~a0~0#1.base|) |c_ULTIMATE.start_main_~a0~0#1.offset|)))) (not (= .cse1 0))))))) (< (+ |c_ULTIMATE.start_main_~i~1#1| 1) |ULTIMATE.start_main_~n~0#1|) (not (< |c_ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|)))) is different from false [2022-07-12 04:20:28,002 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_upsweep_~left~0#1| Int) (v_ArrVal_220 Int) (|ULTIMATE.start_upsweep_~a#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_7| Int) (|ULTIMATE.start_main_~n~0#1| Int) (v_ArrVal_215 Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse7 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| .cse7) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse7))) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4 .cse7) v_ArrVal_215))))) (let ((.cse2 (store (let ((.cse5 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_7| 4) |ULTIMATE.start_upsweep_~a#1.offset|))) (store .cse5 .cse6 (+ (select .cse5 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (select .cse5 .cse6)))) (+ |ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4)) v_ArrVal_220)) (.cse3 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (select .cse2 .cse3))) (or (not (= .cse0 0)) (not (< (+ |c_ULTIMATE.start_main_~i~1#1| 1) |ULTIMATE.start_main_~n~0#1|)) (< (+ |c_ULTIMATE.start_main_~i~1#1| 2) |ULTIMATE.start_main_~n~0#1|) (let ((.cse4 (+ .cse0 (select .cse2 |ULTIMATE.start_main_~a~0#1.offset|)))) (= (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse4) |ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~a0~0#1.base|) |c_ULTIMATE.start_main_~a0~0#1.offset|)) .cse4))))))) is different from false [2022-07-12 04:20:30,084 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_upsweep_~left~0#1| Int) (v_ArrVal_220 Int) (|v_ULTIMATE.start_upsweep_~right~0#1_7| Int) (|ULTIMATE.start_upsweep_~a#1.offset| Int) (|ULTIMATE.start_main_~n~0#1| Int) (v_ArrVal_215 Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |c_ULTIMATE.start_main_#t~malloc16#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4) v_ArrVal_215)))) (let ((.cse3 (store (let ((.cse5 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_7| 4) |ULTIMATE.start_upsweep_~a#1.offset|))) (store .cse5 .cse6 (+ (select .cse5 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (select .cse5 .cse6)))) (+ |ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4)) v_ArrVal_220)) (.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (select .cse3 .cse4))) (or (< 2 |ULTIMATE.start_main_~n~0#1|) (not (= .cse0 0)) (let ((.cse1 (+ (select .cse3 |ULTIMATE.start_main_~a~0#1.offset|) .cse0))) (= .cse1 (+ (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse3 .cse4 .cse1) |ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |c_ULTIMATE.start_main_#t~malloc16#1.offset|) .cse0))) (not (< 1 |ULTIMATE.start_main_~n~0#1|))))))) is different from false [2022-07-12 04:20:30,164 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_226 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_upsweep_~left~0#1| Int) (v_ArrVal_220 Int) (|ULTIMATE.start_upsweep_~a#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_7| Int) (|ULTIMATE.start_main_~n~0#1| Int) (v_ArrVal_215 Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_226 |c_ULTIMATE.start_main_#t~malloc16#1.offset| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_226) |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4) v_ArrVal_215)))) (let ((.cse2 (store (let ((.cse6 (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_7| 4) |ULTIMATE.start_upsweep_~a#1.offset|)) (.cse5 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse5 .cse6 (+ (select .cse5 .cse6) (select .cse5 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|))))) (+ |ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~n~0#1| 4)) v_ArrVal_220)) (.cse3 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (select .cse2 .cse3))) (or (not (= .cse0 0)) (< 2 |ULTIMATE.start_main_~n~0#1|) (let ((.cse4 (+ .cse0 (select .cse2 |ULTIMATE.start_main_~a~0#1.offset|)))) (= (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse4) |ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |c_ULTIMATE.start_main_#t~malloc16#1.offset|) .cse0) .cse4)) (not (< 1 |ULTIMATE.start_main_~n~0#1|))))))) is different from false [2022-07-12 04:20:30,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675527013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:20:30,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:20:30,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 28] total 35 [2022-07-12 04:20:30,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2451535] [2022-07-12 04:20:30,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:20:30,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 04:20:30,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:20:30,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 04:20:30,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2198, Unknown=70, NotChecked=500, Total=2970 [2022-07-12 04:20:30,170 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 32 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 04:20:32,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:21:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:00,891 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2022-07-12 04:21:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 04:21:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 32 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-07-12 04:21:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:00,893 INFO L225 Difference]: With dead ends: 140 [2022-07-12 04:21:00,893 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 04:21:00,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 194.1s TimeCoverageRelationStatistics Valid=459, Invalid=5027, Unknown=84, NotChecked=750, Total=6320 [2022-07-12 04:21:00,896 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 84 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 486 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:00,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 485 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 366 Invalid, 1 Unknown, 486 Unchecked, 2.5s Time] [2022-07-12 04:21:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 04:21:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 85. [2022-07-12 04:21:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 74 states have internal predecessors, (89), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:21:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-07-12 04:21:00,909 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 53 [2022-07-12 04:21:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:00,910 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-07-12 04:21:00,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 32 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 04:21:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-07-12 04:21:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 04:21:00,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:00,911 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:00,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:01,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:01,135 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1645706784, now seen corresponding path program 2 times [2022-07-12 04:21:01,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:01,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754079470] [2022-07-12 04:21:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:01,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:01,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:21:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:01,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:21:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:01,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:21:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:01,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:21:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:21:01,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:01,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754079470] [2022-07-12 04:21:01,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754079470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:01,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831072950] [2022-07-12 04:21:01,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:21:01,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:01,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:01,272 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) [2022-07-12 04:21:01,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:21:01,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:21:01,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:01,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 04:21:01,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:21:01,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:21:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831072950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:01,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:21:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2022-07-12 04:21:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290157159] [2022-07-12 04:21:01,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:01,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:21:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:21:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:21:01,582 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:02,101 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2022-07-12 04:21:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 04:21:02,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-07-12 04:21:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:02,105 INFO L225 Difference]: With dead ends: 160 [2022-07-12 04:21:02,105 INFO L226 Difference]: Without dead ends: 139 [2022-07-12 04:21:02,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=768, Unknown=0, NotChecked=0, Total=992 [2022-07-12 04:21:02,107 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 115 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:02,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 409 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:21:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-12 04:21:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2022-07-12 04:21:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.2) internal successors, (90), 75 states have internal predecessors, (90), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:21:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-07-12 04:21:02,143 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 55 [2022-07-12 04:21:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:02,144 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-07-12 04:21:02,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-07-12 04:21:02,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 04:21:02,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:02,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:02,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:02,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:02,365 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash 59219556, now seen corresponding path program 1 times [2022-07-12 04:21:02,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:02,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457639079] [2022-07-12 04:21:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:02,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:02,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:21:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:02,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 04:21:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:02,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 04:21:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:02,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 04:21:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:21:02,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457639079] [2022-07-12 04:21:02,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457639079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714050788] [2022-07-12 04:21:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:02,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:02,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:02,504 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) [2022-07-12 04:21:02,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:21:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 04:21:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:21:02,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:21:02,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714050788] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:02,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:21:02,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-07-12 04:21:02,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457342369] [2022-07-12 04:21:02,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:02,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:21:02,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:02,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:21:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:21:02,826 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:04,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:21:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:05,848 INFO L93 Difference]: Finished difference Result 207 states and 251 transitions. [2022-07-12 04:21:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 04:21:05,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-07-12 04:21:05,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:05,850 INFO L225 Difference]: With dead ends: 207 [2022-07-12 04:21:05,850 INFO L226 Difference]: Without dead ends: 192 [2022-07-12 04:21:05,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:21:05,851 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 207 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:05,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 530 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 498 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-07-12 04:21:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-12 04:21:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 103. [2022-07-12 04:21:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 92 states have internal predecessors, (111), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:21:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2022-07-12 04:21:05,874 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 55 [2022-07-12 04:21:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:05,875 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2022-07-12 04:21:05,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2022-07-12 04:21:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 04:21:05,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:05,876 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:05,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:06,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 04:21:06,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash 576449656, now seen corresponding path program 3 times [2022-07-12 04:21:06,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:06,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235027116] [2022-07-12 04:21:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:06,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:06,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:21:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:06,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 04:21:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:06,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 04:21:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:06,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 04:21:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:21:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235027116] [2022-07-12 04:21:06,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235027116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331144120] [2022-07-12 04:21:06,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:21:06,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:06,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:06,211 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) [2022-07-12 04:21:06,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:21:06,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 04:21:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 04:21:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 04:21:06,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 04:21:07,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331144120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:07,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:21:07,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 16] total 36 [2022-07-12 04:21:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758673271] [2022-07-12 04:21:07,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:07,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 04:21:07,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 04:21:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 04:21:07,435 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 36 states, 34 states have (on average 3.0) internal successors, (102), 35 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 04:21:09,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:21:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:11,228 INFO L93 Difference]: Finished difference Result 242 states and 305 transitions. [2022-07-12 04:21:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 04:21:11,229 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.0) internal successors, (102), 35 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) Word has length 56 [2022-07-12 04:21:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:11,229 INFO L225 Difference]: With dead ends: 242 [2022-07-12 04:21:11,230 INFO L226 Difference]: Without dead ends: 181 [2022-07-12 04:21:11,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=586, Invalid=2954, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 04:21:11,231 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 275 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 72 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:11,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 414 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 650 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-07-12 04:21:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-12 04:21:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 137. [2022-07-12 04:21:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 126 states have internal predecessors, (153), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:21:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2022-07-12 04:21:11,255 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 56 [2022-07-12 04:21:11,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:11,255 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2022-07-12 04:21:11,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 3.0) internal successors, (102), 35 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 04:21:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2022-07-12 04:21:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 04:21:11,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:11,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:11,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-12 04:21:11,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:11,462 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1049644789, now seen corresponding path program 2 times [2022-07-12 04:21:11,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:11,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65655374] [2022-07-12 04:21:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:11,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:21:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:11,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 04:21:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:11,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 04:21:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:11,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 04:21:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 04:21:11,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:11,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65655374] [2022-07-12 04:21:11,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65655374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:11,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279403172] [2022-07-12 04:21:11,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:21:11,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:11,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:11,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:21:11,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:21:11,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:11,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:21:11,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:21:11,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:21:12,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279403172] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:12,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:21:12,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 25 [2022-07-12 04:21:12,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855700402] [2022-07-12 04:21:12,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:12,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 04:21:12,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 04:21:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-07-12 04:21:12,169 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:14,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:21:16,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:21:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:17,379 INFO L93 Difference]: Finished difference Result 207 states and 252 transitions. [2022-07-12 04:21:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:21:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-07-12 04:21:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:17,381 INFO L225 Difference]: With dead ends: 207 [2022-07-12 04:21:17,381 INFO L226 Difference]: Without dead ends: 192 [2022-07-12 04:21:17,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:21:17,382 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 251 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:17,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 509 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 830 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-07-12 04:21:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-12 04:21:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 137. [2022-07-12 04:21:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 1.1984126984126984) internal successors, (151), 126 states have internal predecessors, (151), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:21:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 165 transitions. [2022-07-12 04:21:17,419 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 165 transitions. Word has length 57 [2022-07-12 04:21:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:17,420 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 165 transitions. [2022-07-12 04:21:17,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 165 transitions. [2022-07-12 04:21:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 04:21:17,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:17,421 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:17,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:17,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 04:21:17,627 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:17,628 INFO L85 PathProgramCache]: Analyzing trace with hash 116417284, now seen corresponding path program 3 times [2022-07-12 04:21:17,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:17,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827724974] [2022-07-12 04:21:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:17,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:17,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:21:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:17,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 04:21:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:17,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 04:21:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:17,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 04:21:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:21:17,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:17,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827724974] [2022-07-12 04:21:17,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827724974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:17,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525462143] [2022-07-12 04:21:17,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:21:17,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:17,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:17,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:21:17,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:21:17,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:17,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 04:21:17,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:21:18,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:21:18,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525462143] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:18,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:21:18,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-07-12 04:21:18,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806293294] [2022-07-12 04:21:18,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:18,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:21:18,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:18,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:21:18,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:21:18,134 INFO L87 Difference]: Start difference. First operand 137 states and 165 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:20,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:21:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:20,842 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2022-07-12 04:21:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 04:21:20,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2022-07-12 04:21:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:20,843 INFO L225 Difference]: With dead ends: 225 [2022-07-12 04:21:20,843 INFO L226 Difference]: Without dead ends: 199 [2022-07-12 04:21:20,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 04:21:20,844 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 220 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:20,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 376 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 458 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-07-12 04:21:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-12 04:21:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 144. [2022-07-12 04:21:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 133 states have (on average 1.2105263157894737) internal successors, (161), 133 states have internal predecessors, (161), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:21:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 175 transitions. [2022-07-12 04:21:20,875 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 175 transitions. Word has length 58 [2022-07-12 04:21:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:20,875 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 175 transitions. [2022-07-12 04:21:20,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 175 transitions. [2022-07-12 04:21:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 04:21:20,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:20,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:20,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:21,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 04:21:21,088 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1156626236, now seen corresponding path program 4 times [2022-07-12 04:21:21,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:21,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615499449] [2022-07-12 04:21:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:21,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:21,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:21:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:21,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 04:21:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:21,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 04:21:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:21,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 04:21:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 04:21:21,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:21,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615499449] [2022-07-12 04:21:21,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615499449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:21,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499849998] [2022-07-12 04:21:21,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:21:21,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:21,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:21,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:21:21,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:21:21,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:21:21,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:21:21,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:21:21,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499849998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:21,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:21:21,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2022-07-12 04:21:21,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474583518] [2022-07-12 04:21:21,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:21,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:21:21,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:21,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:21:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:21:21,395 INFO L87 Difference]: Start difference. First operand 144 states and 175 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:23,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:21:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:23,807 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2022-07-12 04:21:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 04:21:23,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2022-07-12 04:21:23,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:23,816 INFO L225 Difference]: With dead ends: 187 [2022-07-12 04:21:23,816 INFO L226 Difference]: Without dead ends: 160 [2022-07-12 04:21:23,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-07-12 04:21:23,817 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 61 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:23,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 288 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-12 04:21:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-12 04:21:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 119. [2022-07-12 04:21:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 108 states have internal predecessors, (130), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:21:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 144 transitions. [2022-07-12 04:21:23,839 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 144 transitions. Word has length 58 [2022-07-12 04:21:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:23,839 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 144 transitions. [2022-07-12 04:21:23,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 144 transitions. [2022-07-12 04:21:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 04:21:23,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:23,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:23,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:24,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 04:21:24,061 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:24,061 INFO L85 PathProgramCache]: Analyzing trace with hash -4426440, now seen corresponding path program 5 times [2022-07-12 04:21:24,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:24,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457458461] [2022-07-12 04:21:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:24,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:24,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:21:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:24,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 04:21:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:24,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 04:21:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:24,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 04:21:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:21:24,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:24,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457458461] [2022-07-12 04:21:24,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457458461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:24,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549488582] [2022-07-12 04:21:24,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:21:24,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:24,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:24,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:24,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 04:21:24,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 04:21:24,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:24,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:21:24,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 04:21:24,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 04:21:24,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549488582] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:24,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:21:24,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 21 [2022-07-12 04:21:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981702289] [2022-07-12 04:21:24,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:24,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 04:21:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 04:21:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-07-12 04:21:24,948 INFO L87 Difference]: Start difference. First operand 119 states and 144 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:26,067 INFO L93 Difference]: Finished difference Result 285 states and 367 transitions. [2022-07-12 04:21:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 04:21:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2022-07-12 04:21:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:26,071 INFO L225 Difference]: With dead ends: 285 [2022-07-12 04:21:26,071 INFO L226 Difference]: Without dead ends: 276 [2022-07-12 04:21:26,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1828, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 04:21:26,072 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 221 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:26,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 372 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:21:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-12 04:21:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 124. [2022-07-12 04:21:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 113 states have (on average 1.2123893805309736) internal successors, (137), 113 states have internal predecessors, (137), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:21:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2022-07-12 04:21:26,107 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 61 [2022-07-12 04:21:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:26,107 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2022-07-12 04:21:26,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:21:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2022-07-12 04:21:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 04:21:26,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:26,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:26,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:26,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 04:21:26,315 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:26,315 INFO L85 PathProgramCache]: Analyzing trace with hash 108996138, now seen corresponding path program 6 times [2022-07-12 04:21:26,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:26,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241686737] [2022-07-12 04:21:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:26,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:26,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:21:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:26,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 04:21:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:26,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 04:21:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:26,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 04:21:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:21:26,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:26,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241686737] [2022-07-12 04:21:26,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241686737] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:26,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457606546] [2022-07-12 04:21:26,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:21:26,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:26,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:26,454 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:26,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 04:21:26,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 04:21:26,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:26,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 151 conjunts are in the unsatisfiable core [2022-07-12 04:21:26,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:26,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 04:21:26,588 INFO L390 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 7 treesize of output 6 [2022-07-12 04:21:26,653 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 04:21:26,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 04:21:26,687 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_563 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_563) |c_#memory_int|)) is different from true [2022-07-12 04:21:26,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-12 04:21:26,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-07-12 04:21:26,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-07-12 04:21:26,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-07-12 04:21:26,853 INFO L356 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-07-12 04:21:26,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 31 [2022-07-12 04:21:26,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-07-12 04:21:26,983 INFO L356 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-07-12 04:21:26,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 39 [2022-07-12 04:21:27,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-07-12 04:21:28,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2022-07-12 04:21:30,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43