./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewnifrev2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/rewnifrev2.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 a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:57:13,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:57:13,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:57:13,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:57:13,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:57:13,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:57:13,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:57:13,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:57:13,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:57:13,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:57:13,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:57:13,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:57:13,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:57:13,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:57:13,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:57:13,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:57:13,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:57:13,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:57:13,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:57:13,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:57:13,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:57:13,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:57:13,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:57:13,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:57:13,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:57:13,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:57:13,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:57:13,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:57:13,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:57:13,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:57:13,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:57:13,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:57:13,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:57:13,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:57:13,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:57:13,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:57:13,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:57:13,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:57:13,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:57:13,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:57:13,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:57:13,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:57:13,690 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:57:13,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:57:13,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:57:13,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:57:13,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:57:13,694 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:57:13,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:57:13,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:57:13,695 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:57:13,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:57:13,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:57:13,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:57:13,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:57:13,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:57:13,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:57:13,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:57:13,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:57:13,697 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:57:13,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:57:13,697 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:57:13,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:57:13,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:57:13,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:57:13,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:57:13,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:57:13,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:57:13,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:57:13,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:57:13,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:57:13,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:57:13,699 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:57:13,699 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:57:13,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:57:13,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:57:13,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 [2021-12-21 09:57:13,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:57:13,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:57:13,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:57:13,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:57:13,899 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:57:13,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnifrev2.c [2021-12-21 09:57:13,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63ef72b77/e76d9eaf90824ac6ae62b8bd0a1212fe/FLAGfc364f821 [2021-12-21 09:57:14,278 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:57:14,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c [2021-12-21 09:57:14,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63ef72b77/e76d9eaf90824ac6ae62b8bd0a1212fe/FLAGfc364f821 [2021-12-21 09:57:14,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63ef72b77/e76d9eaf90824ac6ae62b8bd0a1212fe [2021-12-21 09:57:14,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:57:14,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:57:14,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:57:14,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:57:14,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:57:14,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@223cb5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14, skipping insertion in model container [2021-12-21 09:57:14,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:57:14,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:57:14,473 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2021-12-21 09:57:14,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:57:14,491 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:57:14,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2021-12-21 09:57:14,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:57:14,520 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:57:14,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14 WrapperNode [2021-12-21 09:57:14,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:57:14,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:57:14,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:57:14,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:57:14,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,544 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2021-12-21 09:57:14,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:57:14,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:57:14,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:57:14,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:57:14,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:57:14,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:57:14,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:57:14,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:57:14,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (1/1) ... [2021-12-21 09:57:14,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:57:14,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:14,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 09:57:14,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 09:57:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:57:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:57:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:57:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 09:57:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:57:14,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:57:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:57:14,700 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:57:14,701 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:57:14,829 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:57:14,833 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:57:14,834 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 09:57:14,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:14 BoogieIcfgContainer [2021-12-21 09:57:14,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:57:14,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:57:14,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:57:14,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:57:14,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:57:14" (1/3) ... [2021-12-21 09:57:14,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229fbf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:57:14, skipping insertion in model container [2021-12-21 09:57:14,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:14" (2/3) ... [2021-12-21 09:57:14,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229fbf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:57:14, skipping insertion in model container [2021-12-21 09:57:14,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:14" (3/3) ... [2021-12-21 09:57:14,841 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnifrev2.c [2021-12-21 09:57:14,880 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:57:14,880 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:57:14,928 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:57:14,933 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 09:57:14,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:57:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 09:57:14,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:14,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:14,945 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash 126991449, now seen corresponding path program 1 times [2021-12-21 09:57:14,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:14,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250237598] [2021-12-21 09:57:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:14,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:15,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250237598] [2021-12-21 09:57:15,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250237598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:57:15,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:57:15,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 09:57:15,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083949248] [2021-12-21 09:57:15,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:57:15,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 09:57:15,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 09:57:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 09:57:15,111 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:15,119 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-12-21 09:57:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 09:57:15,121 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 09:57:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:15,125 INFO L225 Difference]: With dead ends: 27 [2021-12-21 09:57:15,125 INFO L226 Difference]: Without dead ends: 12 [2021-12-21 09:57:15,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 09:57:15,131 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:15,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:57:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-21 09:57:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-21 09:57:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-21 09:57:15,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-12-21 09:57:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:15,151 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-21 09:57:15,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-21 09:57:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 09:57:15,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:15,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:15,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:57:15,154 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:15,158 INFO L85 PathProgramCache]: Analyzing trace with hash 121450323, now seen corresponding path program 1 times [2021-12-21 09:57:15,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:15,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548683817] [2021-12-21 09:57:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:15,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:15,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:15,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548683817] [2021-12-21 09:57:15,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548683817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:57:15,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:57:15,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:57:15,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986535072] [2021-12-21 09:57:15,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:57:15,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:57:15,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:15,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:57:15,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:57:15,228 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:15,251 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-12-21 09:57:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:57:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 09:57:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:15,252 INFO L225 Difference]: With dead ends: 20 [2021-12-21 09:57:15,252 INFO L226 Difference]: Without dead ends: 13 [2021-12-21 09:57:15,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:57:15,255 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:15,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:57:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-21 09:57:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-21 09:57:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-21 09:57:15,262 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-12-21 09:57:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:15,263 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-21 09:57:15,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-21 09:57:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 09:57:15,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:15,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:15,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 09:57:15,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:15,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1899941007, now seen corresponding path program 1 times [2021-12-21 09:57:15,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:15,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193270205] [2021-12-21 09:57:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:15,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:15,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:15,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193270205] [2021-12-21 09:57:15,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193270205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:57:15,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:57:15,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 09:57:15,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881240062] [2021-12-21 09:57:15,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:57:15,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 09:57:15,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:15,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 09:57:15,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 09:57:15,483 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:15,567 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-12-21 09:57:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 09:57:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 09:57:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:15,568 INFO L225 Difference]: With dead ends: 19 [2021-12-21 09:57:15,569 INFO L226 Difference]: Without dead ends: 17 [2021-12-21 09:57:15,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-12-21 09:57:15,570 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:15,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:57:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-21 09:57:15,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-12-21 09:57:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:15,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-21 09:57:15,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-12-21 09:57:15,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:15,573 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-21 09:57:15,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:15,574 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-21 09:57:15,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 09:57:15,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:15,574 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:15,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 09:57:15,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:15,575 INFO L85 PathProgramCache]: Analyzing trace with hash 604563239, now seen corresponding path program 1 times [2021-12-21 09:57:15,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:15,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13087339] [2021-12-21 09:57:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:15,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:15,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:15,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13087339] [2021-12-21 09:57:15,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13087339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:15,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280510066] [2021-12-21 09:57:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:15,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:15,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:15,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:57:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 09:57:15,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:15,783 INFO L353 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-21 09:57:15,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 09:57:15,973 INFO L353 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-21 09:57:15,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-21 09:57:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:15,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:16,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280510066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:57:16,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:57:16,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-12-21 09:57:16,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836915273] [2021-12-21 09:57:16,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:16,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 09:57:16,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 09:57:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-12-21 09:57:16,117 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:16,323 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-21 09:57:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 09:57:16,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-21 09:57:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:16,324 INFO L225 Difference]: With dead ends: 24 [2021-12-21 09:57:16,324 INFO L226 Difference]: Without dead ends: 22 [2021-12-21 09:57:16,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-12-21 09:57:16,325 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:16,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 34 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 56 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-21 09:57:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-21 09:57:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-12-21 09:57:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-12-21 09:57:16,328 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2021-12-21 09:57:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:16,329 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-12-21 09:57:16,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-12-21 09:57:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 09:57:16,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:16,329 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:16,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:16,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:16,539 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:16,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1572614179, now seen corresponding path program 2 times [2021-12-21 09:57:16,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:16,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375443610] [2021-12-21 09:57:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:16,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:16,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:16,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375443610] [2021-12-21 09:57:16,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375443610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:16,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754132051] [2021-12-21 09:57:16,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:57:16,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:16,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:16,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:16,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:57:16,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:57:16,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:16,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 09:57:16,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:16,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:16,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754132051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:57:16,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:57:16,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-21 09:57:16,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516749116] [2021-12-21 09:57:16,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:16,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 09:57:16,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:16,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 09:57:16,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:57:16,831 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:16,883 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-12-21 09:57:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 09:57:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 09:57:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:16,884 INFO L225 Difference]: With dead ends: 38 [2021-12-21 09:57:16,884 INFO L226 Difference]: Without dead ends: 22 [2021-12-21 09:57:16,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-12-21 09:57:16,885 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:16,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 49 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:57:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-21 09:57:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-12-21 09:57:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-21 09:57:16,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2021-12-21 09:57:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:16,889 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-21 09:57:16,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-21 09:57:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 09:57:16,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:16,890 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:16,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 09:57:17,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:17,108 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:17,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:17,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1704999301, now seen corresponding path program 3 times [2021-12-21 09:57:17,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:17,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547591359] [2021-12-21 09:57:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:17,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:17,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:17,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547591359] [2021-12-21 09:57:17,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547591359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:17,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877925209] [2021-12-21 09:57:17,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:57:17,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:17,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:17,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:17,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:57:17,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 09:57:17,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:17,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 09:57:17,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:17,316 INFO L353 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-21 09:57:17,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 09:57:17,360 INFO L353 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-21 09:57:17,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:57:17,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 09:57:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:17,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:17,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877925209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:57:17,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:57:17,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2021-12-21 09:57:17,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155264556] [2021-12-21 09:57:17,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:17,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 09:57:17,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 09:57:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-21 09:57:17,684 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:22,014 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-21 09:57:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 09:57:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 09:57:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:22,015 INFO L225 Difference]: With dead ends: 30 [2021-12-21 09:57:22,015 INFO L226 Difference]: Without dead ends: 28 [2021-12-21 09:57:22,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=209, Invalid=659, Unknown=2, NotChecked=0, Total=870 [2021-12-21 09:57:22,016 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:22,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 55 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 53 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-21 09:57:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-21 09:57:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-12-21 09:57:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-21 09:57:22,022 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2021-12-21 09:57:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:22,022 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-21 09:57:22,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-21 09:57:22,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 09:57:22,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:22,023 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:22,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:22,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:22,235 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:22,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1219683633, now seen corresponding path program 4 times [2021-12-21 09:57:22,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:22,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109412298] [2021-12-21 09:57:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:22,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:22,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:22,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109412298] [2021-12-21 09:57:22,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109412298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:22,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530020149] [2021-12-21 09:57:22,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:57:22,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:22,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:22,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:22,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:57:22,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:57:22,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 09:57:22,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:22,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:22,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530020149] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:57:22,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:57:22,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 16 [2021-12-21 09:57:22,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151406306] [2021-12-21 09:57:22,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:22,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 09:57:22,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:22,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 09:57:22,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-12-21 09:57:22,503 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:22,564 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-12-21 09:57:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 09:57:22,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 09:57:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:22,565 INFO L225 Difference]: With dead ends: 48 [2021-12-21 09:57:22,566 INFO L226 Difference]: Without dead ends: 28 [2021-12-21 09:57:22,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=160, Unknown=0, NotChecked=0, Total=272 [2021-12-21 09:57:22,566 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:22,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:57:22,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-21 09:57:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-21 09:57:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-21 09:57:22,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2021-12-21 09:57:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:22,590 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-21 09:57:22,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-21 09:57:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 09:57:22,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:22,591 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:22,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:22,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:22,808 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1670835535, now seen corresponding path program 5 times [2021-12-21 09:57:22,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:22,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810536180] [2021-12-21 09:57:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:22,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:23,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810536180] [2021-12-21 09:57:23,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810536180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577751281] [2021-12-21 09:57:23,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:57:23,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:23,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:23,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:23,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 09:57:23,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 09:57:23,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:23,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 09:57:23,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:23,109 INFO L353 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-21 09:57:23,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 09:57:23,148 INFO L353 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-21 09:57:23,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:57:23,184 INFO L353 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-21 09:57:23,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:57:23,472 INFO L353 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-21 09:57:23,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-21 09:57:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:23,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:23,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577751281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:57:23,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:57:23,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2021-12-21 09:57:23,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484105621] [2021-12-21 09:57:23,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:23,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 09:57:23,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 09:57:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-12-21 09:57:23,742 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:25,614 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-12-21 09:57:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 09:57:25,614 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-21 09:57:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:25,615 INFO L225 Difference]: With dead ends: 41 [2021-12-21 09:57:25,616 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 09:57:25,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=438, Invalid=1723, Unknown=1, NotChecked=0, Total=2162 [2021-12-21 09:57:25,619 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:25,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 140 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 121 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2021-12-21 09:57:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 09:57:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-12-21 09:57:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-12-21 09:57:25,631 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2021-12-21 09:57:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:25,631 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-12-21 09:57:25,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-12-21 09:57:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 09:57:25,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:25,632 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:25,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:25,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:25,849 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:25,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1047363067, now seen corresponding path program 6 times [2021-12-21 09:57:25,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:25,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684421857] [2021-12-21 09:57:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:25,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:25,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:25,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684421857] [2021-12-21 09:57:25,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684421857] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:25,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842364849] [2021-12-21 09:57:25,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:57:25,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:25,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:25,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:25,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 09:57:25,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-21 09:57:25,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:25,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 09:57:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:26,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:26,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842364849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:57:26,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:57:26,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 19 [2021-12-21 09:57:26,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818977683] [2021-12-21 09:57:26,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:26,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 09:57:26,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 09:57:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-12-21 09:57:26,186 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:26,249 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-12-21 09:57:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 09:57:26,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-21 09:57:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:26,250 INFO L225 Difference]: With dead ends: 58 [2021-12-21 09:57:26,250 INFO L226 Difference]: Without dead ends: 34 [2021-12-21 09:57:26,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2021-12-21 09:57:26,251 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:26,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 76 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:57:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-21 09:57:26,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-21 09:57:26,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-21 09:57:26,255 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2021-12-21 09:57:26,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:26,256 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-21 09:57:26,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-21 09:57:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 09:57:26,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:26,257 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:26,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:26,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:26,473 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2041873501, now seen corresponding path program 7 times [2021-12-21 09:57:26,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:26,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738077077] [2021-12-21 09:57:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:26,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:26,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:26,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738077077] [2021-12-21 09:57:26,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738077077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670957053] [2021-12-21 09:57:26,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 09:57:26,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:26,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:26,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:26,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 09:57:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:26,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 09:57:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:26,709 INFO L353 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-21 09:57:26,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 09:57:26,749 INFO L353 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-21 09:57:26,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:57:26,770 INFO L353 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-21 09:57:26,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:57:26,799 INFO L353 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-21 09:57:26,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:57:26,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 09:57:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:27,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:27,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670957053] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:57:27,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:57:27,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 25 [2021-12-21 09:57:27,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011449450] [2021-12-21 09:57:27,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:27,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 09:57:27,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 09:57:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:57:27,262 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:27,591 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-12-21 09:57:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:57:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-21 09:57:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:27,592 INFO L225 Difference]: With dead ends: 42 [2021-12-21 09:57:27,592 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 09:57:27,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 09:57:27,593 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 94 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:27,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 126 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 148 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2021-12-21 09:57:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 09:57:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-12-21 09:57:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-12-21 09:57:27,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-12-21 09:57:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:27,600 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-12-21 09:57:27,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-12-21 09:57:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 09:57:27,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:27,601 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:27,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:27,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:27,815 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:27,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1072678489, now seen corresponding path program 8 times [2021-12-21 09:57:27,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:27,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558370185] [2021-12-21 09:57:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:27,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:27,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:27,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558370185] [2021-12-21 09:57:27,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558370185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:27,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126921624] [2021-12-21 09:57:27,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:57:27,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:27,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:27,879 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:27,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 09:57:27,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:57:27,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:27,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 09:57:27,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:28,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:28,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126921624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:57:28,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:57:28,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 22 [2021-12-21 09:57:28,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559622763] [2021-12-21 09:57:28,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:28,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 09:57:28,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:28,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 09:57:28,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=273, Unknown=0, NotChecked=0, Total=462 [2021-12-21 09:57:28,197 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:28,303 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-12-21 09:57:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 09:57:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-21 09:57:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:28,304 INFO L225 Difference]: With dead ends: 68 [2021-12-21 09:57:28,304 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 09:57:28,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2021-12-21 09:57:28,305 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:28,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 104 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:57:28,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 09:57:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-12-21 09:57:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-12-21 09:57:28,310 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-12-21 09:57:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:28,310 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-12-21 09:57:28,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-12-21 09:57:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 09:57:28,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:28,311 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:28,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:28,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 09:57:28,528 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash 811766135, now seen corresponding path program 9 times [2021-12-21 09:57:28,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:28,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827648178] [2021-12-21 09:57:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:28,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:28,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:28,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827648178] [2021-12-21 09:57:28,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827648178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:28,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974853692] [2021-12-21 09:57:28,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:57:28,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:28,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:28,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:28,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 09:57:28,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 09:57:28,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:28,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-21 09:57:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:28,964 INFO L353 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-21 09:57:28,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 09:57:29,004 INFO L353 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-21 09:57:29,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:57:29,044 INFO L353 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-21 09:57:29,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:57:29,088 INFO L353 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-21 09:57:29,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:57:35,183 INFO L353 Elim1Store]: treesize reduction 111, result has 27.9 percent of original size [2021-12-21 09:57:35,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 60 [2021-12-21 09:57:50,577 INFO L353 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2021-12-21 09:57:50,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 27 [2021-12-21 09:57:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 45 proven. 29 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:50,622 INFO L328 TraceCheckSpWp]: Computing backward predicates...