./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_compare_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_compare_ground.i -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 d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:22:53,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:22:53,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:22:53,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:22:53,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:22:53,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:22:53,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:22:53,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:22:53,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:22:53,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:22:53,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:22:53,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:22:53,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:22:53,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:22:53,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:22:53,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:22:53,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:22:53,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:22:53,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:22:53,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:22:53,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:22:53,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:22:53,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:22:53,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:22:53,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:22:53,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:22:53,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:22:53,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:22:53,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:22:53,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:22:53,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:22:53,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:22:53,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:22:53,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:22:53,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:22:53,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:22:53,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:22:53,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:22:53,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:22:53,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:22:53,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:22:53,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:22:53,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:22:53,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:22:53,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:22:53,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:22:53,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:22:53,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:22:53,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:22:53,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:22:53,648 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:22:53,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:22:53,649 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:22:53,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:22:53,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:22:53,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:22:53,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:22:53,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:22:53,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:22:53,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:22:53,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:22:53,651 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:22:53,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:22:53,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:22:53,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:22:53,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:22:53,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:22:53,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:22:53,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:22:53,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:22:53,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:22:53,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:22:53,653 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:22:53,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:22:53,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:22:53,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:22:53,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c [2021-12-15 21:22:53,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:22:53,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:22:53,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:22:53,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:22:53,872 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:22:53,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compare_ground.i [2021-12-15 21:22:53,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c29469d19/4375b596dda74da7bf4bf4154714a70d/FLAG952a507d9 [2021-12-15 21:22:54,275 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:22:54,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i [2021-12-15 21:22:54,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c29469d19/4375b596dda74da7bf4bf4154714a70d/FLAG952a507d9 [2021-12-15 21:22:54,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c29469d19/4375b596dda74da7bf4bf4154714a70d [2021-12-15 21:22:54,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:22:54,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:22:54,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:22:54,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:22:54,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:22:54,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:54,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6835c2a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54, skipping insertion in model container [2021-12-15 21:22:54,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:54,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:22:54,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:22:54,866 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-examples/standard_compare_ground.i[816,829] [2021-12-15 21:22:54,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:22:54,890 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:22:54,902 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-examples/standard_compare_ground.i[816,829] [2021-12-15 21:22:54,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:22:54,933 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:22:54,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54 WrapperNode [2021-12-15 21:22:54,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:22:54,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:22:54,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:22:54,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:22:54,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:54,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:54,969 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-12-15 21:22:54,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:22:54,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:22:54,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:22:54,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:22:54,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:54,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:54,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:54,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:54,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:55,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:55,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:55,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:22:55,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:22:55,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:22:55,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:22:55,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (1/1) ... [2021-12-15 21:22:55,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:22:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:55,040 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) [2021-12-15 21:22:55,061 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 [2021-12-15 21:22:55,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:22:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:22:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:22:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:22:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:22:55,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:22:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:22:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:22:55,139 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:22:55,140 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:22:55,243 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:22:55,248 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:22:55,248 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 21:22:55,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:22:55 BoogieIcfgContainer [2021-12-15 21:22:55,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:22:55,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:22:55,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:22:55,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:22:55,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:22:54" (1/3) ... [2021-12-15 21:22:55,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4daf262c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:22:55, skipping insertion in model container [2021-12-15 21:22:55,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:22:54" (2/3) ... [2021-12-15 21:22:55,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4daf262c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:22:55, skipping insertion in model container [2021-12-15 21:22:55,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:22:55" (3/3) ... [2021-12-15 21:22:55,257 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2021-12-15 21:22:55,261 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:22:55,261 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:22:55,295 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:22:55,301 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 [2021-12-15 21:22:55,301 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:22:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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) [2021-12-15 21:22:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 21:22:55,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:55,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:55,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:55,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2005121311, now seen corresponding path program 1 times [2021-12-15 21:22:55,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:55,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116962229] [2021-12-15 21:22:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:55,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:22:55,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:55,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116962229] [2021-12-15 21:22:55,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116962229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:22:55,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:22:55,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:22:55,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331774257] [2021-12-15 21:22:55,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:22:55,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:22:55,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:55,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:22:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:22:55,511 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-15 21:22:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:55,532 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2021-12-15 21:22:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:22:55,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-12-15 21:22:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:55,540 INFO L225 Difference]: With dead ends: 36 [2021-12-15 21:22:55,541 INFO L226 Difference]: Without dead ends: 17 [2021-12-15 21:22:55,543 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 [2021-12-15 21:22:55,546 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:55,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:22:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-15 21:22:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-12-15 21:22:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-12-15 21:22:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-15 21:22:55,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-12-15 21:22:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:55,577 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-15 21:22:55,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-15 21:22:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-15 21:22:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 21:22:55,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:55,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:55,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:22:55,582 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1565815188, now seen corresponding path program 1 times [2021-12-15 21:22:55,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247521150] [2021-12-15 21:22:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:55,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:22:55,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:55,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247521150] [2021-12-15 21:22:55,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247521150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:55,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198054940] [2021-12-15 21:22:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:55,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:55,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:55,651 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) [2021-12-15 21:22:55,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:22:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 21:22:55,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:22:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:22:55,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:22:55,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198054940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:22:55,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:22:55,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 21:22:55,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047464370] [2021-12-15 21:22:55,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:22:55,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:22:55,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:55,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:22:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:22:55,754 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-15 21:22:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:55,768 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-12-15 21:22:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:22:55,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-12-15 21:22:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:55,770 INFO L225 Difference]: With dead ends: 26 [2021-12-15 21:22:55,772 INFO L226 Difference]: Without dead ends: 19 [2021-12-15 21:22:55,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:22:55,774 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:55,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:22:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-15 21:22:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-12-15 21:22:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-15 21:22:55,783 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-12-15 21:22:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:55,784 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-15 21:22:55,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-15 21:22:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-15 21:22:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 21:22:55,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:55,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:55,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:22:55,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:55,992 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1959146159, now seen corresponding path program 1 times [2021-12-15 21:22:55,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:55,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542447021] [2021-12-15 21:22:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:55,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:22:56,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:56,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542447021] [2021-12-15 21:22:56,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542447021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374983856] [2021-12-15 21:22:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:56,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:56,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:56,050 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) [2021-12-15 21:22:56,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:22:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:56,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 21:22:56,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:22:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:22:56,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:22:56,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374983856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:22:56,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:22:56,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 21:22:56,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644315576] [2021-12-15 21:22:56,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:22:56,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:22:56,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:22:56,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:22:56,189 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:56,203 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-12-15 21:22:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:22:56,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 21:22:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:56,205 INFO L225 Difference]: With dead ends: 27 [2021-12-15 21:22:56,206 INFO L226 Difference]: Without dead ends: 17 [2021-12-15 21:22:56,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:22:56,208 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:56,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:22:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-15 21:22:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-15 21:22:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-12-15 21:22:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-15 21:22:56,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-12-15 21:22:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:56,216 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-15 21:22:56,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-15 21:22:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 21:22:56,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:56,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:56,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:22:56,441 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,SelfDestructingSolverStorable2 [2021-12-15 21:22:56,441 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:56,442 INFO L85 PathProgramCache]: Analyzing trace with hash -184138797, now seen corresponding path program 1 times [2021-12-15 21:22:56,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:56,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987257622] [2021-12-15 21:22:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:56,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:22:56,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:56,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987257622] [2021-12-15 21:22:56,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987257622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:56,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527664704] [2021-12-15 21:22:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:56,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:56,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:56,506 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) [2021-12-15 21:22:56,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:22:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:56,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 21:22:56,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:22:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:22:56,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:22:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:22:56,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527664704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:22:56,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:22:56,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 21:22:56,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246737847] [2021-12-15 21:22:56,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:22:56,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 21:22:56,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 21:22:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:22:56,677 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:56,700 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-12-15 21:22:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:22:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 21:22:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:56,703 INFO L225 Difference]: With dead ends: 35 [2021-12-15 21:22:56,703 INFO L226 Difference]: Without dead ends: 23 [2021-12-15 21:22:56,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:22:56,704 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:56,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:22:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-15 21:22:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-15 21:22:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-15 21:22:56,708 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2021-12-15 21:22:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:56,708 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-15 21:22:56,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-15 21:22:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 21:22:56,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:56,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:56,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:22:56,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:56,915 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash -494561575, now seen corresponding path program 2 times [2021-12-15 21:22:56,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:56,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295139073] [2021-12-15 21:22:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:56,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 21:22:57,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:57,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295139073] [2021-12-15 21:22:57,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295139073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:57,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070653692] [2021-12-15 21:22:57,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:22:57,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:57,001 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) [2021-12-15 21:22:57,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:22:57,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:22:57,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:22:57,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:22:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:22:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:22:57,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:22:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:22:57,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070653692] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:22:57,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:22:57,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-15 21:22:57,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847211327] [2021-12-15 21:22:57,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:22:57,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:22:57,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:57,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:22:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:22:57,259 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-12-15 21:22:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:57,318 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-12-15 21:22:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 21:22:57,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) Word has length 20 [2021-12-15 21:22:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:57,321 INFO L225 Difference]: With dead ends: 52 [2021-12-15 21:22:57,321 INFO L226 Difference]: Without dead ends: 40 [2021-12-15 21:22:57,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:22:57,323 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:57,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 44 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:22:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-15 21:22:57,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-12-15 21:22:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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) [2021-12-15 21:22:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-15 21:22:57,336 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2021-12-15 21:22:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:57,336 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-15 21:22:57,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-12-15 21:22:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-15 21:22:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:22:57,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:57,338 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:57,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:22:57,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:57,547 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 451448930, now seen corresponding path program 3 times [2021-12-15 21:22:57,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:57,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904059902] [2021-12-15 21:22:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:57,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 21:22:57,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904059902] [2021-12-15 21:22:57,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904059902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829261584] [2021-12-15 21:22:57,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:22:57,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:57,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:22:57,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:22:57,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 21:22:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:22:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:22:57,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:22:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-15 21:22:57,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:22:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-15 21:22:57,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829261584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:22:57,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:22:57,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-12-15 21:22:57,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537893032] [2021-12-15 21:22:57,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:22:57,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 21:22:57,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:57,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 21:22:57,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:22:57,935 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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) [2021-12-15 21:22:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:58,007 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-12-15 21:22:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 21:22:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-15 21:22:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:58,011 INFO L225 Difference]: With dead ends: 68 [2021-12-15 21:22:58,011 INFO L226 Difference]: Without dead ends: 53 [2021-12-15 21:22:58,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:22:58,014 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:58,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 82 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:22:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-15 21:22:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-12-15 21:22:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-12-15 21:22:58,024 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 35 [2021-12-15 21:22:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:58,024 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-12-15 21:22:58,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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) [2021-12-15 21:22:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-12-15 21:22:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 21:22:58,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:58,028 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:58,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:22:58,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:58,240 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash 678799712, now seen corresponding path program 4 times [2021-12-15 21:22:58,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:58,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872268848] [2021-12-15 21:22:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:58,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-15 21:22:58,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872268848] [2021-12-15 21:22:58,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872268848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78192092] [2021-12-15 21:22:58,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:22:58,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:58,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:58,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:22:58,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:22:58,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:22:58,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:22:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 21:22:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:22:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-15 21:22:58,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:22:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-15 21:22:58,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78192092] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:22:58,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:22:58,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-12-15 21:22:58,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201350751] [2021-12-15 21:22:58,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:22:58,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 21:22:58,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:58,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 21:22:58,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-12-15 21:22:58,890 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:58,968 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2021-12-15 21:22:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 21:22:58,969 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-15 21:22:58,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:58,973 INFO L225 Difference]: With dead ends: 105 [2021-12-15 21:22:58,973 INFO L226 Difference]: Without dead ends: 78 [2021-12-15 21:22:58,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-12-15 21:22:58,974 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:58,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:22:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-15 21:22:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-15 21:22:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 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) [2021-12-15 21:22:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-15 21:22:58,989 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 49 [2021-12-15 21:22:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:58,989 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-15 21:22:58,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-15 21:22:58,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 21:22:58,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:58,990 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:59,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:22:59,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:59,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -408162682, now seen corresponding path program 5 times [2021-12-15 21:22:59,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:59,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53336839] [2021-12-15 21:22:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:59,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-15 21:22:59,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:59,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53336839] [2021-12-15 21:22:59,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53336839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:59,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381285244] [2021-12-15 21:22:59,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:22:59,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:59,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:59,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:22:59,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:23:42,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-12-15 21:23:42,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:23:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:23:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:23:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-15 21:23:42,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:23:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-15 21:23:43,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381285244] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:23:43,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:23:43,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-12-15 21:23:43,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264376585] [2021-12-15 21:23:43,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:23:43,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-15 21:23:43,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:23:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-15 21:23:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 21:23:43,638 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2021-12-15 21:23:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:23:43,799 INFO L93 Difference]: Finished difference Result 157 states and 186 transitions. [2021-12-15 21:23:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-15 21:23:43,800 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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 75 [2021-12-15 21:23:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:23:43,802 INFO L225 Difference]: With dead ends: 157 [2021-12-15 21:23:43,802 INFO L226 Difference]: Without dead ends: 130 [2021-12-15 21:23:43,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 21:23:43,805 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:23:43,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 54 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:23:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-15 21:23:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-15 21:23:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 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) [2021-12-15 21:23:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2021-12-15 21:23:43,825 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 75 [2021-12-15 21:23:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:23:43,825 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2021-12-15 21:23:43,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2021-12-15 21:23:43,826 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2021-12-15 21:23:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-15 21:23:43,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:23:43,831 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:23:43,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 21:23:44,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:23:44,048 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:23:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:23:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1135775314, now seen corresponding path program 6 times [2021-12-15 21:23:44,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:23:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986412233] [2021-12-15 21:23:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:23:44,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:23:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:23:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-15 21:23:45,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:23:45,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986412233] [2021-12-15 21:23:45,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986412233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:23:45,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025411813] [2021-12-15 21:23:45,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:23:45,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:23:45,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:23:45,200 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:23:45,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:23:45,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 21:23:45,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:23:45,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 21:23:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:23:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-12-15 21:23:46,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:23:46,365 INFO L354 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2021-12-15 21:23:46,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2021-12-15 21:23:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-12-15 21:23:46,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025411813] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:23:46,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:23:46,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 8, 7] total 63 [2021-12-15 21:23:46,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021039399] [2021-12-15 21:23:46,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:23:46,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-15 21:23:46,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:23:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-15 21:23:46,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1411, Invalid=2495, Unknown=0, NotChecked=0, Total=3906 [2021-12-15 21:23:46,544 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 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) [2021-12-15 21:23:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:23:48,143 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2021-12-15 21:23:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-15 21:23:48,144 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 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 127 [2021-12-15 21:23:48,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:23:48,145 INFO L225 Difference]: With dead ends: 165 [2021-12-15 21:23:48,145 INFO L226 Difference]: Without dead ends: 138 [2021-12-15 21:23:48,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4197, Invalid=9609, Unknown=0, NotChecked=0, Total=13806 [2021-12-15 21:23:48,150 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:23:48,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 63 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:23:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-15 21:23:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2021-12-15 21:23:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 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) [2021-12-15 21:23:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2021-12-15 21:23:48,162 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2021-12-15 21:23:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:23:48,163 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2021-12-15 21:23:48,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 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) [2021-12-15 21:23:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2021-12-15 21:23:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-15 21:23:48,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:23:48,165 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:23:48,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 21:23:48,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 21:23:48,381 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:23:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:23:48,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2019846662, now seen corresponding path program 1 times [2021-12-15 21:23:48,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:23:48,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33789716] [2021-12-15 21:23:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:23:48,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:23:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:23:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-15 21:23:49,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:23:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33789716] [2021-12-15 21:23:49,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33789716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:23:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924806714] [2021-12-15 21:23:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:23:49,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:23:49,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:23:49,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:23:49,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:23:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:23:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-15 21:23:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:23:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-15 21:23:50,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:23:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-15 21:23:52,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924806714] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:23:52,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:23:52,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2021-12-15 21:23:52,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095210798] [2021-12-15 21:23:52,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:23:52,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-15 21:23:52,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:23:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-15 21:23:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-12-15 21:23:52,846 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:23:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:23:53,131 INFO L93 Difference]: Finished difference Result 269 states and 325 transitions. [2021-12-15 21:23:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-15 21:23:53,132 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-15 21:23:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:23:53,133 INFO L225 Difference]: With dead ends: 269 [2021-12-15 21:23:53,133 INFO L226 Difference]: Without dead ends: 240 [2021-12-15 21:23:53,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-12-15 21:23:53,137 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:23:53,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 106 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:23:53,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-15 21:23:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-12-15 21:23:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 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) [2021-12-15 21:23:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2021-12-15 21:23:53,145 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 133 [2021-12-15 21:23:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:23:53,146 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2021-12-15 21:23:53,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:23:53,146 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2021-12-15 21:23:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-15 21:23:53,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:23:53,148 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:23:53,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:23:53,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 21:23:53,372 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:23:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:23:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash -651492388, now seen corresponding path program 2 times [2021-12-15 21:23:53,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:23:53,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907815616] [2021-12-15 21:23:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:23:53,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:23:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:23:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-15 21:23:57,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:23:57,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907815616] [2021-12-15 21:23:57,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907815616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:23:57,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35044739] [2021-12-15 21:23:57,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:23:57,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:23:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:23:57,060 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:23:57,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 21:23:57,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:23:57,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:23:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-15 21:23:57,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:23:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-15 21:23:57,958 INFO L328 TraceCheckSpWp]: Computing backward predicates...