./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/nr4.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/nr4.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 3219130777e42bfc39497c312a66c6d1b1af231a6df358861eaa545434d20cb1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:55:54,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:55:54,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:55:54,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:55:54,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:55:54,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:55:54,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:55:54,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:55:54,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:55:54,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:55:54,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:55:54,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:55:54,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:55:54,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:55:54,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:55:54,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:55:54,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:55:54,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:55:54,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:55:54,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:55:54,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:55:54,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:55:54,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:55:54,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:55:54,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:55:54,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:55:54,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:55:54,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:55:54,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:55:54,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:55:54,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:55:54,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:55:54,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:55:54,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:55:54,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:55:54,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:55:54,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:55:54,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:55:54,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:55:54,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:55:54,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:55:54,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:55:54,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:55:54,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:55:54,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:55:54,689 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:55:54,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:55:54,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:55:54,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:55:54,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:55:54,690 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:55:54,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:55:54,691 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:55:54,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:55:54,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:55:54,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:55:54,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:55:54,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:55:54,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:55:54,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:55:54,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:55:54,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:55:54,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:55:54,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:55:54,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:55:54,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:55:54,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:55:54,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:55:54,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:55:54,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:55:54,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:55:54,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:55:54,695 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:55:54,695 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:55:54,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:55:54,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:55:54,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3219130777e42bfc39497c312a66c6d1b1af231a6df358861eaa545434d20cb1 [2021-12-21 09:55:54,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:55:54,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:55:54,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:55:54,953 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:55:54,954 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:55:54,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr4.c [2021-12-21 09:55:54,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb12fce48/58166fa95ad042b89afb5421446cbd14/FLAG6d9cbc450 [2021-12-21 09:55:55,302 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:55:55,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr4.c [2021-12-21 09:55:55,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb12fce48/58166fa95ad042b89afb5421446cbd14/FLAG6d9cbc450 [2021-12-21 09:55:55,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb12fce48/58166fa95ad042b89afb5421446cbd14 [2021-12-21 09:55:55,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:55:55,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:55:55,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:55:55,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:55:55,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:55:55,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:55,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@466a4d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55, skipping insertion in model container [2021-12-21 09:55:55,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:55,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:55:55,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:55:55,918 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/nr4.c[394,407] [2021-12-21 09:55:55,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:55:55,937 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:55:55,947 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/nr4.c[394,407] [2021-12-21 09:55:55,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:55:55,970 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:55:55,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55 WrapperNode [2021-12-21 09:55:55,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:55:55,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:55:55,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:55:55,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:55:55,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:55,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:56,002 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-12-21 09:55:56,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:55:56,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:55:56,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:55:56,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:55:56,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:56,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:56,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:56,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:56,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:56,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:56,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:56,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:55:56,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:55:56,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:55:56,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:55:56,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (1/1) ... [2021-12-21 09:55:56,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:55:56,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:56,058 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 09:55:56,063 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 09:55:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:55:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:55:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 09:55:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:55:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:55:56,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:55:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:55:56,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 09:55:56,129 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:55:56,130 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:55:56,279 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:55:56,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:55:56,284 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 09:55:56,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:56 BoogieIcfgContainer [2021-12-21 09:55:56,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:55:56,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:55:56,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:55:56,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:55:56,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:55:55" (1/3) ... [2021-12-21 09:55:56,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5575bf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:55:56, skipping insertion in model container [2021-12-21 09:55:56,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:55" (2/3) ... [2021-12-21 09:55:56,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5575bf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:55:56, skipping insertion in model container [2021-12-21 09:55:56,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:56" (3/3) ... [2021-12-21 09:55:56,306 INFO L111 eAbstractionObserver]: Analyzing ICFG nr4.c [2021-12-21 09:55:56,309 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:55:56,309 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:55:56,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:55:56,340 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 09:55:56,340 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:55:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 09:55:56,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:56,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:56,369 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash -405965127, now seen corresponding path program 1 times [2021-12-21 09:55:56,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:56,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638583004] [2021-12-21 09:55:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:56,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:56,486 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 09:55:56,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638583004] [2021-12-21 09:55:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638583004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:56,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:56,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 09:55:56,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521713402] [2021-12-21 09:55:56,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:56,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 09:55:56,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 09:55:56,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 09:55:56,518 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 09:55:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:56,527 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-12-21 09:55:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 09:55:56,529 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) Word has length 13 [2021-12-21 09:55:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:56,534 INFO L225 Difference]: With dead ends: 45 [2021-12-21 09:55:56,534 INFO L226 Difference]: Without dead ends: 20 [2021-12-21 09:55:56,536 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 09:55:56,542 INFO L933 BasicCegarLoop]: 31 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, 31 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 09:55:56,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-21 09:55:56,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-21 09:55:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-21 09:55:56,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-12-21 09:55:56,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:56,562 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-21 09:55:56,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 09:55:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-21 09:55:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 09:55:56,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:56,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:56,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:55:56,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:56,565 INFO L85 PathProgramCache]: Analyzing trace with hash 274093243, now seen corresponding path program 1 times [2021-12-21 09:55:56,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:56,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641228407] [2021-12-21 09:55:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:56,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:56,649 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 09:55:56,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641228407] [2021-12-21 09:55:56,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641228407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:56,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:56,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 09:55:56,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883834173] [2021-12-21 09:55:56,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:56,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 09:55:56,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:56,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 09:55:56,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 09:55:56,653 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 09:55:56,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:56,679 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-12-21 09:55:56,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 09:55:56,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) Word has length 13 [2021-12-21 09:55:56,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:56,680 INFO L225 Difference]: With dead ends: 29 [2021-12-21 09:55:56,680 INFO L226 Difference]: Without dead ends: 27 [2021-12-21 09:55:56,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:55:56,681 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:56,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-21 09:55:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-12-21 09:55:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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 09:55:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-21 09:55:56,685 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-12-21 09:55:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:56,686 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-21 09:55:56,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 09:55:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-21 09:55:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 09:55:56,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:56,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:56,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 09:55:56,687 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 274152825, now seen corresponding path program 1 times [2021-12-21 09:55:56,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:56,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403074620] [2021-12-21 09:55:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:56,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:56,816 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 09:55:56,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:56,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403074620] [2021-12-21 09:55:56,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403074620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:56,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:56,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 09:55:56,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890211501] [2021-12-21 09:55:56,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:56,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 09:55:56,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 09:55:56,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:55:56,819 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 09:55:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:56,847 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-12-21 09:55:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 09:55:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) Word has length 13 [2021-12-21 09:55:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:56,848 INFO L225 Difference]: With dead ends: 38 [2021-12-21 09:55:56,848 INFO L226 Difference]: Without dead ends: 27 [2021-12-21 09:55:56,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:55:56,850 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:56,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-21 09:55:56,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-12-21 09:55:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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 09:55:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-21 09:55:56,854 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-12-21 09:55:56,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:56,854 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-21 09:55:56,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 09:55:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-21 09:55:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 09:55:56,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:56,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:56,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 09:55:56,856 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash -715167033, now seen corresponding path program 1 times [2021-12-21 09:55:56,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:56,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598331362] [2021-12-21 09:55:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:56,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:56,901 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 09:55:56,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:56,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598331362] [2021-12-21 09:55:56,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598331362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:56,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:56,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:55:56,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267816885] [2021-12-21 09:55:56,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:56,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:55:56,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:55:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:55:56,903 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 09:55:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:56,922 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-21 09:55:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:55:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) Word has length 16 [2021-12-21 09:55:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:56,924 INFO L225 Difference]: With dead ends: 42 [2021-12-21 09:55:56,925 INFO L226 Difference]: Without dead ends: 26 [2021-12-21 09:55:56,925 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 09:55:56,927 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:56,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-21 09:55:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-12-21 09:55:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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 09:55:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-21 09:55:56,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-12-21 09:55:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:56,938 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-21 09:55:56,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 09:55:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-21 09:55:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 09:55:56,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:56,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:56,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 09:55:56,940 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1618667584, now seen corresponding path program 1 times [2021-12-21 09:55:56,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:56,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836112119] [2021-12-21 09:55:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:56,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:56,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:56,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836112119] [2021-12-21 09:55:56,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836112119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:56,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080659651] [2021-12-21 09:55:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:56,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:56,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:56,996 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 09:55:56,997 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 09:55:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:57,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 09:55:57,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:57,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080659651] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:57,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:57,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 09:55:57,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187219679] [2021-12-21 09:55:57,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:57,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 09:55:57,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 09:55:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:55:57,175 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 09:55:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:57,233 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-12-21 09:55:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 09:55:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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) Word has length 19 [2021-12-21 09:55:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:57,235 INFO L225 Difference]: With dead ends: 50 [2021-12-21 09:55:57,235 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 09:55:57,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:55:57,236 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:57,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 68 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 09:55:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-21 09:55:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 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 09:55:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-12-21 09:55:57,251 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2021-12-21 09:55:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:57,252 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-12-21 09:55:57,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 09:55:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-12-21 09:55:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 09:55:57,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:57,253 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:57,292 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 09:55:57,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:57,455 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2124634745, now seen corresponding path program 2 times [2021-12-21 09:55:57,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:57,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959602787] [2021-12-21 09:55:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:57,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:57,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959602787] [2021-12-21 09:55:57,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959602787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849806394] [2021-12-21 09:55:57,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:55:57,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:57,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:57,552 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 09:55:57,579 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 09:55:57,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:55:57,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:55:57,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:57,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 09:55:57,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849806394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:57,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 09:55:57,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-21 09:55:57,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030002465] [2021-12-21 09:55:57,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:57,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 09:55:57,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:57,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 09:55:57,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-12-21 09:55:57,740 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 09:55:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:57,767 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-12-21 09:55:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 09:55:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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) Word has length 28 [2021-12-21 09:55:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:57,768 INFO L225 Difference]: With dead ends: 59 [2021-12-21 09:55:57,768 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 09:55:57,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-12-21 09:55:57,769 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:57,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 09:55:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-21 09:55:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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 09:55:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-21 09:55:57,774 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 28 [2021-12-21 09:55:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:57,775 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-21 09:55:57,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 09:55:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-21 09:55:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 09:55:57,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:57,776 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:57,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:57,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 09:55:57,986 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:57,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:57,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1423570167, now seen corresponding path program 1 times [2021-12-21 09:55:57,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:57,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218342299] [2021-12-21 09:55:57,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:57,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:58,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:58,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218342299] [2021-12-21 09:55:58,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218342299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:58,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770815715] [2021-12-21 09:55:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:58,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:58,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:58,686 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 09:55:58,687 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 09:55:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 09:55:58,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:58,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-21 09:55:58,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:58,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-12-21 09:55:58,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:58,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-12-21 09:55:59,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:59,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:55:59,106 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 15 treesize of output 7 [2021-12-21 09:55:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:59,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:34,273 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_21| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_20| Int) (v_ArrVal_64 Int) (v_ArrVal_62 Int)) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse0 (* 16 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_21| (- 4))) v_ArrVal_62) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_20| (- 4))) v_ArrVal_64)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (not (<= (+ |v_ULTIMATE.start_main_~j~0#1_20| 1) |v_ULTIMATE.start_main_~j~0#1_21|)))) (not (<= (+ |v_ULTIMATE.start_main_~j~0#1_21| 1) |c_ULTIMATE.start_main_~j~0#1|)))) is different from false [2021-12-21 09:56:56,577 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 48 treesize of output 46 [2021-12-21 09:56:56,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 848 treesize of output 844 [2021-12-21 09:56:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-21 09:56:58,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770815715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:58,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:58,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 14] total 36 [2021-12-21 09:56:58,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932994434] [2021-12-21 09:56:58,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:58,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 09:56:58,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 09:56:58,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=959, Unknown=28, NotChecked=66, Total=1260 [2021-12-21 09:56:58,847 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:00,925 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~j~0#1| 1)) (.cse2 (* 16 |c_ULTIMATE.start_main_~i~0#1|)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (= .cse0 4) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= (+ (- 2) |c_ULTIMATE.start_main_~MINVAL~0#1|) 0) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~j~0#1_21| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_20| Int) (v_ArrVal_64 Int) (v_ArrVal_62 Int)) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse1 (* 16 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_21| (- 4))) v_ArrVal_62) (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_20| (- 4))) v_ArrVal_64)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (not (<= (+ |v_ULTIMATE.start_main_~j~0#1_20| 1) |v_ULTIMATE.start_main_~j~0#1_21|)))) (not (<= (+ |v_ULTIMATE.start_main_~j~0#1_21| 1) |c_ULTIMATE.start_main_~j~0#1|)))) (<= .cse0 (div (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) 4)) (<= .cse0 (select .cse3 (+ .cse2 (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4))))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (<= 4 (select .cse3 0)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse3 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (= (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|) 0) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2021-12-21 09:57:02,973 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* 16 |c_ULTIMATE.start_main_~i~0#1|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (<= 4 (select .cse0 (+ (- 16) .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= (+ (- 2) |c_ULTIMATE.start_main_~MINVAL~0#1|) 0) (<= |c_ULTIMATE.start_main_~j~0#1| 2) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~j~0#1_21| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_20| Int) (v_ArrVal_64 Int) (v_ArrVal_62 Int)) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse2 (* 16 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_21| (- 4))) v_ArrVal_62) (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_20| (- 4))) v_ArrVal_64)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (not (<= (+ |v_ULTIMATE.start_main_~j~0#1_20| 1) |v_ULTIMATE.start_main_~j~0#1_21|)))) (not (<= (+ |v_ULTIMATE.start_main_~j~0#1_21| 1) |c_ULTIMATE.start_main_~j~0#1|)))) (<= (+ |c_ULTIMATE.start_main_~j~0#1| 1) (div (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) 4)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (<= 4 (select .cse0 0)) (= (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|) 0) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2021-12-21 09:57:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:03,713 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2021-12-21 09:57:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 09:57:03,714 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 09:57:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:03,714 INFO L225 Difference]: With dead ends: 139 [2021-12-21 09:57:03,714 INFO L226 Difference]: Without dead ends: 113 [2021-12-21 09:57:03,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 64.1s TimeCoverageRelationStatistics Valid=622, Invalid=2782, Unknown=30, NotChecked=348, Total=3782 [2021-12-21 09:57:03,716 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 427 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:03,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 150 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 323 Invalid, 0 Unknown, 215 Unchecked, 0.2s Time] [2021-12-21 09:57:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-21 09:57:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 53. [2021-12-21 09:57:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 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 09:57:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-12-21 09:57:03,730 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 28 [2021-12-21 09:57:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:03,731 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-12-21 09:57:03,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:57:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-12-21 09:57:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 09:57:03,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:03,733 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:03,750 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 09:57:03,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:03,935 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1580642084, now seen corresponding path program 1 times [2021-12-21 09:57:03,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:03,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800743569] [2021-12-21 09:57:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:03,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:04,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800743569] [2021-12-21 09:57:04,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800743569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:04,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819326484] [2021-12-21 09:57:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:04,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:04,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:04,368 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 09:57:04,369 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 09:57:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:04,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 09:57:04,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:04,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-21 09:57:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:04,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-12-21 09:57:04,633 INFO L353 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2021-12-21 09:57:04,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2021-12-21 09:57:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:57:05,015 INFO L328 TraceCheckSpWp]: Computing backward predicates...