./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/heavy-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/loops/heavy-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 14:51:35,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 14:51:35,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 14:51:35,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 14:51:35,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 14:51:35,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 14:51:35,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 14:51:35,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 14:51:35,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 14:51:35,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 14:51:35,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 14:51:35,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 14:51:35,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 14:51:35,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 14:51:35,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 14:51:35,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 14:51:35,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 14:51:35,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 14:51:35,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 14:51:35,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 14:51:35,760 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 14:51:35,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 14:51:35,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 14:51:35,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 14:51:35,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 14:51:35,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 14:51:35,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 14:51:35,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 14:51:35,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 14:51:35,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 14:51:35,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 14:51:35,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 14:51:35,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 14:51:35,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 14:51:35,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 14:51:35,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 14:51:35,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 14:51:35,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 14:51:35,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 14:51:35,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 14:51:35,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 14:51:35,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 14:51:35,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 14:51:35,809 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 14:51:35,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 14:51:35,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 14:51:35,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 14:51:35,811 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 14:51:35,811 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 14:51:35,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 14:51:35,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 14:51:35,812 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 14:51:35,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 14:51:35,813 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 14:51:35,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 14:51:35,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 14:51:35,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 14:51:35,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 14:51:35,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 14:51:35,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 14:51:35,814 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 14:51:35,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 14:51:35,815 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 14:51:35,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 14:51:35,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 14:51:35,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 14:51:35,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 14:51:35,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:51:35,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 14:51:35,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 14:51:35,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 14:51:35,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 14:51:35,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 14:51:35,817 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 14:51:35,817 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 14:51:35,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 14:51:35,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a [2022-07-19 14:51:36,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 14:51:36,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 14:51:36,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 14:51:36,065 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 14:51:36,065 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 14:51:36,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/heavy-1.c [2022-07-19 14:51:36,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d30f04ad/a19506a8cb704624b2b925fb1456c061/FLAG79397edb7 [2022-07-19 14:51:36,480 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 14:51:36,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-1.c [2022-07-19 14:51:36,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d30f04ad/a19506a8cb704624b2b925fb1456c061/FLAG79397edb7 [2022-07-19 14:51:36,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d30f04ad/a19506a8cb704624b2b925fb1456c061 [2022-07-19 14:51:36,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 14:51:36,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 14:51:36,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 14:51:36,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 14:51:36,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 14:51:36,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58bd5b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36, skipping insertion in model container [2022-07-19 14:51:36,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 14:51:36,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 14:51:37,054 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/loops/heavy-1.c[600,613] [2022-07-19 14:51:37,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:51:37,090 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 14:51:37,101 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/loops/heavy-1.c[600,613] [2022-07-19 14:51:37,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:51:37,144 INFO L208 MainTranslator]: Completed translation [2022-07-19 14:51:37,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37 WrapperNode [2022-07-19 14:51:37,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 14:51:37,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 14:51:37,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 14:51:37,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 14:51:37,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,176 INFO L137 Inliner]: procedures = 12, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2022-07-19 14:51:37,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 14:51:37,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 14:51:37,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 14:51:37,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 14:51:37,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 14:51:37,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 14:51:37,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 14:51:37,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 14:51:37,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (1/1) ... [2022-07-19 14:51:37,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:51:37,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:37,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 14:51:37,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 14:51:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 14:51:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 14:51:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 14:51:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 14:51:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 14:51:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 14:51:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 14:51:37,323 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 14:51:37,324 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 14:51:37,485 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 14:51:37,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 14:51:37,490 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 14:51:37,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:51:37 BoogieIcfgContainer [2022-07-19 14:51:37,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 14:51:37,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 14:51:37,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 14:51:37,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 14:51:37,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 02:51:36" (1/3) ... [2022-07-19 14:51:37,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d4a103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:51:37, skipping insertion in model container [2022-07-19 14:51:37,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:37" (2/3) ... [2022-07-19 14:51:37,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d4a103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:51:37, skipping insertion in model container [2022-07-19 14:51:37,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:51:37" (3/3) ... [2022-07-19 14:51:37,515 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2022-07-19 14:51:37,526 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 14:51:37,539 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 14:51:37,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 14:51:37,609 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15828549, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3efb585f [2022-07-19 14:51:37,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 14:51:37,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 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) [2022-07-19 14:51:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-19 14:51:37,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:37,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-19 14:51:37,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:37,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash 28726599, now seen corresponding path program 1 times [2022-07-19 14:51:37,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:37,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426938434] [2022-07-19 14:51:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:37,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:37,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426938434] [2022-07-19 14:51:37,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426938434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:51:37,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:51:37,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 14:51:37,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430856653] [2022-07-19 14:51:37,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:51:37,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 14:51:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 14:51:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:51:37,811 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-07-19 14:51:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:37,822 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2022-07-19 14:51:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 14:51:37,824 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-07-19 14:51:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:37,830 INFO L225 Difference]: With dead ends: 26 [2022-07-19 14:51:37,830 INFO L226 Difference]: Without dead ends: 11 [2022-07-19 14:51:37,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:51:37,838 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:37,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-19 14:51:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-19 14:51:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:51:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-07-19 14:51:37,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2022-07-19 14:51:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:37,858 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-07-19 14:51:37,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-07-19 14:51:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-07-19 14:51:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-19 14:51:37,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:37,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-19 14:51:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 14:51:37,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 28697769, now seen corresponding path program 1 times [2022-07-19 14:51:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:37,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213855774] [2022-07-19 14:51:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:37,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:37,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213855774] [2022-07-19 14:51:37,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213855774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:51:37,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:51:37,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:51:37,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111464257] [2022-07-19 14:51:37,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:51:37,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:51:37,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:51:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:51:37,906 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-19 14:51:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:37,933 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-07-19 14:51:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:51:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-07-19 14:51:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:37,934 INFO L225 Difference]: With dead ends: 20 [2022-07-19 14:51:37,934 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 14:51:37,935 INFO L412 NwaCegarLoop]: 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 [2022-07-19 14:51:37,936 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:37,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 14:51:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2022-07-19 14:51:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:51:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-19 14:51:37,940 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2022-07-19 14:51:37,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:37,940 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-19 14:51:37,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-19 14:51:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-19 14:51:37,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 14:51:37,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:37,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:51:37,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 14:51:37,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash 269702257, now seen corresponding path program 1 times [2022-07-19 14:51:37,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:37,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776383428] [2022-07-19 14:51:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:37,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776383428] [2022-07-19 14:51:37,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776383428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:51:38,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:51:38,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:51:38,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236545667] [2022-07-19 14:51:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:51:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:51:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:51:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:51:38,002 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:51:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:38,016 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-07-19 14:51:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:51:38,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-19 14:51:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:38,017 INFO L225 Difference]: With dead ends: 25 [2022-07-19 14:51:38,018 INFO L226 Difference]: Without dead ends: 16 [2022-07-19 14:51:38,018 INFO L412 NwaCegarLoop]: 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 [2022-07-19 14:51:38,019 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:38,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-19 14:51:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2022-07-19 14:51:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:51:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-19 14:51:38,023 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-07-19 14:51:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:38,023 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-19 14:51:38,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:51:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-19 14:51:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 14:51:38,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:38,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:51:38,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 14:51:38,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash 904437765, now seen corresponding path program 1 times [2022-07-19 14:51:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:38,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509994739] [2022-07-19 14:51:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:38,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:38,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:38,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509994739] [2022-07-19 14:51:38,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509994739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:51:38,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:51:38,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:51:38,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980933720] [2022-07-19 14:51:38,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:51:38,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:51:38,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:38,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:51:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:51:38,111 INFO L87 Difference]: Start difference. First operand 13 states and 15 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) [2022-07-19 14:51:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:38,122 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-07-19 14:51:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:51:38,123 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 [2022-07-19 14:51:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:38,125 INFO L225 Difference]: With dead ends: 25 [2022-07-19 14:51:38,125 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 14:51:38,127 INFO L412 NwaCegarLoop]: 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 [2022-07-19 14:51:38,135 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 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 [2022-07-19 14:51:38,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 14:51:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-19 14:51:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:51:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-19 14:51:38,142 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2022-07-19 14:51:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:38,143 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-19 14:51:38,143 INFO L496 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) [2022-07-19 14:51:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-19 14:51:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 14:51:38,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:38,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:51:38,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 14:51:38,146 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2012164797, now seen corresponding path program 1 times [2022-07-19 14:51:38,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210395811] [2022-07-19 14:51:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:38,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:38,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210395811] [2022-07-19 14:51:38,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210395811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:51:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221409832] [2022-07-19 14:51:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:38,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:38,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:38,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:51:38,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 14:51:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:38,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 14:51:38,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:51:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:51:38,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:51:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:51:38,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221409832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:51:38,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:51:38,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-19 14:51:38,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58842549] [2022-07-19 14:51:38,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:51:38,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 14:51:38,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 14:51:38,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:51:38,427 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2022-07-19 14:51:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:38,615 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-07-19 14:51:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 14:51:38,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) Word has length 13 [2022-07-19 14:51:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:38,619 INFO L225 Difference]: With dead ends: 52 [2022-07-19 14:51:38,619 INFO L226 Difference]: Without dead ends: 41 [2022-07-19 14:51:38,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2022-07-19 14:51:38,622 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:38,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 14:51:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-19 14:51:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-07-19 14:51:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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) [2022-07-19 14:51:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-07-19 14:51:38,644 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2022-07-19 14:51:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:38,645 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-07-19 14:51:38,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2022-07-19 14:51:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-07-19 14:51:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 14:51:38,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:38,647 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:51:38,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 14:51:38,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:38,856 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash 76140657, now seen corresponding path program 2 times [2022-07-19 14:51:38,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:38,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782080179] [2022-07-19 14:51:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:38,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 14:51:39,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782080179] [2022-07-19 14:51:39,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782080179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:51:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071010651] [2022-07-19 14:51:39,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 14:51:39,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:39,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:39,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:51:39,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 14:51:39,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 14:51:39,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:51:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 14:51:39,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:51:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 14:51:39,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:51:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 14:51:39,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071010651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:51:39,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:51:39,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 8] total 15 [2022-07-19 14:51:39,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590048922] [2022-07-19 14:51:39,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:51:39,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 14:51:39,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:39,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 14:51:39,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-19 14:51:39,290 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-07-19 14:51:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:39,693 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2022-07-19 14:51:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 14:51:39,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 36 [2022-07-19 14:51:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:39,695 INFO L225 Difference]: With dead ends: 134 [2022-07-19 14:51:39,695 INFO L226 Difference]: Without dead ends: 88 [2022-07-19 14:51:39,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2022-07-19 14:51:39,696 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:39,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 40 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 14:51:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-19 14:51:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-07-19 14:51:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 81 states have internal predecessors, (95), 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) [2022-07-19 14:51:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2022-07-19 14:51:39,710 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 36 [2022-07-19 14:51:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:39,710 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2022-07-19 14:51:39,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-07-19 14:51:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2022-07-19 14:51:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 14:51:39,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:39,712 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:51:39,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 14:51:39,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 14:51:39,935 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1898529999, now seen corresponding path program 3 times [2022-07-19 14:51:39,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:39,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376377004] [2022-07-19 14:51:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:39,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 182 proven. 36 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-07-19 14:51:40,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:40,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376377004] [2022-07-19 14:51:40,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376377004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:51:40,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98188223] [2022-07-19 14:51:40,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 14:51:40,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:40,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:40,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:51:40,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 14:51:40,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 14:51:40,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:51:40,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 14:51:40,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:51:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-19 14:51:40,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:51:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-19 14:51:40,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98188223] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:51:40,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:51:40,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2022-07-19 14:51:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882415961] [2022-07-19 14:51:40,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:51:40,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 14:51:40,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 14:51:40,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-19 14:51:40,434 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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) [2022-07-19 14:51:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:41,071 INFO L93 Difference]: Finished difference Result 385 states and 461 transitions. [2022-07-19 14:51:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 14:51:41,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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 56 [2022-07-19 14:51:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:41,076 INFO L225 Difference]: With dead ends: 385 [2022-07-19 14:51:41,076 INFO L226 Difference]: Without dead ends: 306 [2022-07-19 14:51:41,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 14:51:41,078 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:41,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 63 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 14:51:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-19 14:51:41,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 290. [2022-07-19 14:51:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0726643598615917) internal successors, (310), 289 states have internal predecessors, (310), 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) [2022-07-19 14:51:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 310 transitions. [2022-07-19 14:51:41,127 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 310 transitions. Word has length 56 [2022-07-19 14:51:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:41,127 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 310 transitions. [2022-07-19 14:51:41,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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) [2022-07-19 14:51:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 310 transitions. [2022-07-19 14:51:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-07-19 14:51:41,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:41,139 INFO L195 NwaCegarLoop]: trace histogram [112, 112, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-19 14:51:41,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 14:51:41,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:41,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash 153690793, now seen corresponding path program 4 times [2022-07-19 14:51:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:41,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838988979] [2022-07-19 14:51:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:41,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 1718 proven. 49 refuted. 0 times theorem prover too weak. 12903 trivial. 0 not checked. [2022-07-19 14:51:41,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:41,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838988979] [2022-07-19 14:51:41,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838988979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:51:41,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451271408] [2022-07-19 14:51:41,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 14:51:41,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:41,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:51:42,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 14:51:42,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 14:51:42,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:51:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 14:51:42,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:51:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5551 proven. 737 refuted. 0 times theorem prover too weak. 8382 trivial. 0 not checked. [2022-07-19 14:51:42,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:51:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5578 proven. 710 refuted. 0 times theorem prover too weak. 8382 trivial. 0 not checked. [2022-07-19 14:51:42,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451271408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:51:42,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:51:42,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2022-07-19 14:51:42,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340744203] [2022-07-19 14:51:42,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:51:42,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 14:51:42,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 14:51:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-07-19 14:51:42,934 INFO L87 Difference]: Start difference. First operand 290 states and 310 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 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) [2022-07-19 14:51:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:47,861 INFO L93 Difference]: Finished difference Result 1089 states and 1216 transitions. [2022-07-19 14:51:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-19 14:51:47,861 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 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 289 [2022-07-19 14:51:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:47,864 INFO L225 Difference]: With dead ends: 1089 [2022-07-19 14:51:47,864 INFO L226 Difference]: Without dead ends: 818 [2022-07-19 14:51:47,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4341 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2157, Invalid=10499, Unknown=0, NotChecked=0, Total=12656 [2022-07-19 14:51:47,869 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:47,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 116 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 14:51:47,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-07-19 14:51:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 778. [2022-07-19 14:51:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.057915057915058) internal successors, (822), 777 states have internal predecessors, (822), 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) [2022-07-19 14:51:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 822 transitions. [2022-07-19 14:51:47,924 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 822 transitions. Word has length 289 [2022-07-19 14:51:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:47,925 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 822 transitions. [2022-07-19 14:51:47,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 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) [2022-07-19 14:51:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 822 transitions. [2022-07-19 14:51:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2022-07-19 14:51:47,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:47,940 INFO L195 NwaCegarLoop]: trace histogram [320, 320, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-19 14:51:47,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 14:51:48,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:48,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:48,168 INFO L85 PathProgramCache]: Analyzing trace with hash -509282647, now seen corresponding path program 5 times [2022-07-19 14:51:48,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:48,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022152104] [2022-07-19 14:51:48,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:48,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 5702 proven. 64 refuted. 0 times theorem prover too weak. 111636 trivial. 0 not checked. [2022-07-19 14:51:49,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:49,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022152104] [2022-07-19 14:51:49,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022152104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:51:49,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478546871] [2022-07-19 14:51:49,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 14:51:49,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:49,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:49,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:51:49,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 14:51:51,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-19 14:51:51,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:51:51,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 14:51:51,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:51:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2022-07-19 14:51:51,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:51:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2022-07-19 14:51:51,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478546871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:51:51,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:51:51,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-19 14:51:51,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941516479] [2022-07-19 14:51:51,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:51:51,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 14:51:51,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:51,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 14:51:51,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-07-19 14:51:51,872 INFO L87 Difference]: Start difference. First operand 778 states and 822 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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) [2022-07-19 14:51:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:54,321 INFO L93 Difference]: Finished difference Result 2335 states and 2822 transitions. [2022-07-19 14:51:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 14:51:54,321 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 777 [2022-07-19 14:51:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:54,327 INFO L225 Difference]: With dead ends: 2335 [2022-07-19 14:51:54,327 INFO L226 Difference]: Without dead ends: 1578 [2022-07-19 14:51:54,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1571 GetRequests, 1543 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=306, Invalid=506, Unknown=0, NotChecked=0, Total=812 [2022-07-19 14:51:54,329 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:54,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 83 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 14:51:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2022-07-19 14:51:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2022-07-19 14:51:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 1.0285351934051998) internal successors, (1622), 1577 states have internal predecessors, (1622), 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) [2022-07-19 14:51:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 1622 transitions. [2022-07-19 14:51:54,442 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 1622 transitions. Word has length 777 [2022-07-19 14:51:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:54,442 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 1622 transitions. [2022-07-19 14:51:54,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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) [2022-07-19 14:51:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 1622 transitions. [2022-07-19 14:51:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2022-07-19 14:51:54,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:54,486 INFO L195 NwaCegarLoop]: trace histogram [720, 720, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-19 14:51:54,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 14:51:54,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:54,693 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1381259607, now seen corresponding path program 6 times [2022-07-19 14:51:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:54,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275968343] [2022-07-19 14:51:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:54,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 549002 backedges. 26762 proven. 324 refuted. 0 times theorem prover too weak. 521916 trivial. 0 not checked. [2022-07-19 14:51:58,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:58,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275968343] [2022-07-19 14:51:58,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275968343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:51:58,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533981237] [2022-07-19 14:51:58,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 14:51:58,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:58,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:58,663 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:51:58,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process