./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:07:43,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:07:43,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:07:43,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:07:43,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:07:43,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:07:43,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:07:43,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:07:43,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:07:43,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:07:43,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:07:43,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:07:43,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:07:43,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:07:43,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:07:43,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:07:43,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:07:43,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:07:43,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:07:43,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:07:43,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:07:43,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:07:43,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:07:43,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:07:43,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:07:43,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:07:43,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:07:43,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:07:43,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:07:43,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:07:43,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:07:43,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:07:43,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:07:43,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:07:43,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:07:43,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:07:43,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:07:43,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:07:43,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:07:43,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:07:43,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:07:43,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 00:07:43,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:07:43,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:07:43,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:07:43,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:07:43,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:07:43,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:07:43,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:07:43,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:07:43,823 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:07:43,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:07:43,824 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:07:43,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 00:07:43,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:07:43,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:07:43,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:07:43,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:07:43,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:07:43,824 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:07:43,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:07:43,825 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:07:43,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:07:43,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:07:43,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:07:43,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:07:43,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:07:43,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:07:43,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:07:43,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:07:43,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 00:07:43,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 00:07:43,826 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:07:43,826 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:07:43,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:07:43,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2021-12-28 00:07:44,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:07:44,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:07:44,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:07:44,096 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:07:44,096 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:07:44,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-12-28 00:07:44,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c8a75919/7b6ddd18624845f48b74ed1d5ab549b9/FLAGa003063b3 [2021-12-28 00:07:44,513 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:07:44,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-12-28 00:07:44,518 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c8a75919/7b6ddd18624845f48b74ed1d5ab549b9/FLAGa003063b3 [2021-12-28 00:07:44,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c8a75919/7b6ddd18624845f48b74ed1d5ab549b9 [2021-12-28 00:07:44,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:07:44,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:07:44,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:07:44,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:07:44,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:07:44,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:07:44" (1/1) ... [2021-12-28 00:07:44,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b710d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:44, skipping insertion in model container [2021-12-28 00:07:44,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:07:44" (1/1) ... [2021-12-28 00:07:44,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:07:44,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:07:45,107 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-12-28 00:07:45,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:07:45,188 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:07:45,205 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-12-28 00:07:45,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:07:45,244 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:07:45,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45 WrapperNode [2021-12-28 00:07:45,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:07:45,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:07:45,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:07:45,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:07:45,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,292 INFO L137 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 125 [2021-12-28 00:07:45,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:07:45,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:07:45,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:07:45,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:07:45,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:07:45,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:07:45,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:07:45,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:07:45,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (1/1) ... [2021-12-28 00:07:45,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:07:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:07:45,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 00:07:45,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 00:07:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:07:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 00:07:45,385 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 00:07:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 00:07:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 00:07:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 00:07:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:07:45,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:07:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 00:07:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-28 00:07:45,387 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-28 00:07:45,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 00:07:45,447 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:07:45,448 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:07:45,716 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:07:45,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:07:45,723 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-28 00:07:45,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:07:45 BoogieIcfgContainer [2021-12-28 00:07:45,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:07:45,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:07:45,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:07:45,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:07:45,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:07:44" (1/3) ... [2021-12-28 00:07:45,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a66fc74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:07:45, skipping insertion in model container [2021-12-28 00:07:45,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:07:45" (2/3) ... [2021-12-28 00:07:45,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a66fc74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:07:45, skipping insertion in model container [2021-12-28 00:07:45,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:07:45" (3/3) ... [2021-12-28 00:07:45,733 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2021-12-28 00:07:45,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:07:45,738 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:07:45,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:07:45,788 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 00:07:45,789 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:07:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:07:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-28 00:07:45,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:07:45,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:07:45,815 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:07:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:07:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash -750888739, now seen corresponding path program 1 times [2021-12-28 00:07:45,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:07:45,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720454988] [2021-12-28 00:07:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:07:45,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:07:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:45,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:07:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:45,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 00:07:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:45,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 00:07:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:46,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 00:07:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 00:07:46,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:07:46,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720454988] [2021-12-28 00:07:46,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720454988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:07:46,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:07:46,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 00:07:46,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806200877] [2021-12-28 00:07:46,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:07:46,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 00:07:46,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:07:46,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 00:07:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 00:07:46,061 INFO L87 Difference]: Start difference. First operand has 42 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 00:07:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:07:46,113 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2021-12-28 00:07:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 00:07:46,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2021-12-28 00:07:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:07:46,119 INFO L225 Difference]: With dead ends: 81 [2021-12-28 00:07:46,120 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 00:07:46,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 00:07:46,126 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:07:46,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:07:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 00:07:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-28 00:07:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:07:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-12-28 00:07:46,158 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2021-12-28 00:07:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:07:46,159 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-12-28 00:07:46,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 00:07:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-12-28 00:07:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-28 00:07:46,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:07:46,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:07:46,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 00:07:46,163 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:07:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:07:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash 221792227, now seen corresponding path program 1 times [2021-12-28 00:07:46,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:07:46,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827980717] [2021-12-28 00:07:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:07:46,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:07:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:46,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:07:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:46,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 00:07:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:46,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 00:07:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:46,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 00:07:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 00:07:46,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:07:46,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827980717] [2021-12-28 00:07:46,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827980717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:07:46,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:07:46,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 00:07:46,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616830276] [2021-12-28 00:07:46,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:07:46,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 00:07:46,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:07:46,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 00:07:46,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 00:07:46,371 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:07:48,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:07:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:07:48,724 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2021-12-28 00:07:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 00:07:48,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2021-12-28 00:07:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:07:48,726 INFO L225 Difference]: With dead ends: 97 [2021-12-28 00:07:48,726 INFO L226 Difference]: Without dead ends: 69 [2021-12-28 00:07:48,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:07:48,727 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 72 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:07:48,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 273 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-28 00:07:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-28 00:07:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2021-12-28 00:07:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:07:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-12-28 00:07:48,733 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 37 [2021-12-28 00:07:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:07:48,734 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-12-28 00:07:48,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:07:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-12-28 00:07:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 00:07:48,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:07:48,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:07:48,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 00:07:48,736 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:07:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:07:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash 747513669, now seen corresponding path program 1 times [2021-12-28 00:07:48,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:07:48,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335767054] [2021-12-28 00:07:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:07:48,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:07:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:48,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:07:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:48,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 00:07:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:48,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 00:07:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:48,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 00:07:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 00:07:48,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:07:48,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335767054] [2021-12-28 00:07:48,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335767054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:07:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795738138] [2021-12-28 00:07:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:07:48,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:07:48,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:07:48,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:07:48,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 00:07:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:07:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-28 00:07:49,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:07:49,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 00:07:49,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-12-28 00:07:49,212 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 00:07:49,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 00:07:49,240 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_45 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_45))) is different from true [2021-12-28 00:07:49,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-28 00:07:49,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-28 00:07:49,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-12-28 00:07:49,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-12-28 00:07:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-12-28 00:07:49,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:08:12,120 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_check_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_4| Int) (|v_ULTIMATE.start_downsweep_~n#1_5| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_4| (* |v_ULTIMATE.start_downsweep_~n#1_5| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-12-28 00:08:12,157 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_check_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_4| Int) (|v_ULTIMATE.start_downsweep_~n#1_5| Int) (v_ArrVal_46 (Array Int Int)) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| v_ArrVal_46) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_4| (* |v_ULTIMATE.start_downsweep_~n#1_5| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-12-28 00:08:12,166 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_check_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_4| Int) (|v_ULTIMATE.start_downsweep_~n#1_5| Int) (v_ArrVal_46 (Array Int Int)) (|ULTIMATE.start_check_~i~0#1| Int)) (= 0 (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_46) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_4| (* |v_ULTIMATE.start_downsweep_~n#1_5| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))) is different from false [2021-12-28 00:08:12,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795738138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:08:12,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:08:12,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 17 [2021-12-28 00:08:12,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530768126] [2021-12-28 00:08:12,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:08:12,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 00:08:12,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:08:12,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 00:08:12,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=251, Unknown=15, NotChecked=140, Total=462 [2021-12-28 00:08:12,192 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 00:08:22,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:08:22,453 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-12-28 00:08:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 00:08:22,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-12-28 00:08:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:08:22,454 INFO L225 Difference]: With dead ends: 49 [2021-12-28 00:08:22,454 INFO L226 Difference]: Without dead ends: 47 [2021-12-28 00:08:22,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=129, Invalid=569, Unknown=20, NotChecked=212, Total=930 [2021-12-28 00:08:22,455 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:08:22,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 237 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 134 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2021-12-28 00:08:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-28 00:08:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-12-28 00:08:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:08:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-28 00:08:22,459 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 39 [2021-12-28 00:08:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:08:22,460 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-28 00:08:22,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 00:08:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-28 00:08:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 00:08:22,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:08:22,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:08:22,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 00:08:22,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:08:22,675 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:08:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:08:22,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1715230204, now seen corresponding path program 1 times [2021-12-28 00:08:22,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:08:22,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863601340] [2021-12-28 00:08:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:22,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:08:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:22,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:08:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:22,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 00:08:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:22,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 00:08:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:22,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 00:08:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 00:08:22,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:08:22,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863601340] [2021-12-28 00:08:22,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863601340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:08:22,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394135068] [2021-12-28 00:08:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:22,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:08:22,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:08:22,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:08:22,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 00:08:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:22,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 00:08:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:08:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 00:08:22,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:08:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 00:08:23,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394135068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:08:23,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 00:08:23,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2021-12-28 00:08:23,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657132200] [2021-12-28 00:08:23,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 00:08:23,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 00:08:23,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:08:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 00:08:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-28 00:08:23,085 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:25,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:08:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:08:25,424 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2021-12-28 00:08:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 00:08:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-28 00:08:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:08:25,425 INFO L225 Difference]: With dead ends: 116 [2021-12-28 00:08:25,425 INFO L226 Difference]: Without dead ends: 80 [2021-12-28 00:08:25,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-12-28 00:08:25,426 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 115 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:08:25,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 189 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 138 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-28 00:08:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-28 00:08:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2021-12-28 00:08:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:08:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-28 00:08:25,431 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 43 [2021-12-28 00:08:25,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:08:25,432 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-28 00:08:25,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-28 00:08:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 00:08:25,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:08:25,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:08:25,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 00:08:25,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-28 00:08:25,634 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:08:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:08:25,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1080974370, now seen corresponding path program 2 times [2021-12-28 00:08:25,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:08:25,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447188022] [2021-12-28 00:08:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:25,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:08:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:25,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:08:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:25,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 00:08:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:25,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 00:08:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:25,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 00:08:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 00:08:25,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:08:25,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447188022] [2021-12-28 00:08:25,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447188022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:08:25,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541894889] [2021-12-28 00:08:25,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 00:08:25,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:08:25,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:08:25,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:08:25,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 00:08:25,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 00:08:25,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:08:25,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 00:08:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:08:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 00:08:25,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:08:25,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541894889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:08:25,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:08:25,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-28 00:08:25,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62260872] [2021-12-28 00:08:25,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:08:25,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:08:25,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:08:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:08:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:08:25,900 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:08:25,988 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-12-28 00:08:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 00:08:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-12-28 00:08:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:08:25,989 INFO L225 Difference]: With dead ends: 66 [2021-12-28 00:08:25,989 INFO L226 Difference]: Without dead ends: 49 [2021-12-28 00:08:25,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-28 00:08:25,990 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:08:25,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 135 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:08:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-28 00:08:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-12-28 00:08:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:08:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-28 00:08:25,993 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 45 [2021-12-28 00:08:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:08:25,994 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-28 00:08:25,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-28 00:08:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-28 00:08:25,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:08:25,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:08:26,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 00:08:26,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:08:26,199 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:08:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:08:26,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1924122647, now seen corresponding path program 1 times [2021-12-28 00:08:26,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:08:26,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623832773] [2021-12-28 00:08:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:26,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:08:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:08:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 00:08:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 00:08:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 00:08:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 00:08:26,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:08:26,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623832773] [2021-12-28 00:08:26,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623832773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:08:26,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:08:26,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 00:08:26,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675827912] [2021-12-28 00:08:26,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:08:26,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 00:08:26,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:08:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 00:08:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 00:08:26,248 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:08:26,278 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-28 00:08:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 00:08:26,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-12-28 00:08:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:08:26,281 INFO L225 Difference]: With dead ends: 65 [2021-12-28 00:08:26,281 INFO L226 Difference]: Without dead ends: 48 [2021-12-28 00:08:26,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 00:08:26,283 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:08:26,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:08:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-28 00:08:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-28 00:08:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:08:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-28 00:08:26,302 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 48 [2021-12-28 00:08:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:08:26,303 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-28 00:08:26,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-28 00:08:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-28 00:08:26,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:08:26,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:08:26,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 00:08:26,305 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:08:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:08:26,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1397539149, now seen corresponding path program 1 times [2021-12-28 00:08:26,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:08:26,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957933730] [2021-12-28 00:08:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:26,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:08:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:08:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 00:08:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 00:08:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 00:08:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 00:08:26,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:08:26,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957933730] [2021-12-28 00:08:26,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957933730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:08:26,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931325094] [2021-12-28 00:08:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:26,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:08:26,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:08:26,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:08:26,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 00:08:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 00:08:26,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:08:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 00:08:26,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:08:26,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931325094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:08:26,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:08:26,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 12 [2021-12-28 00:08:26,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426733671] [2021-12-28 00:08:26,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:08:26,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:08:26,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:08:26,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:08:26,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:08:26,628 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:08:26,676 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-12-28 00:08:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 00:08:26,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-12-28 00:08:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:08:26,678 INFO L225 Difference]: With dead ends: 61 [2021-12-28 00:08:26,678 INFO L226 Difference]: Without dead ends: 52 [2021-12-28 00:08:26,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:08:26,678 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:08:26,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:08:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-28 00:08:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-12-28 00:08:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:08:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-28 00:08:26,682 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 49 [2021-12-28 00:08:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:08:26,682 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-28 00:08:26,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-28 00:08:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 00:08:26,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:08:26,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:08:26,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 00:08:26,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:08:26,899 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:08:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:08:26,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1418623757, now seen corresponding path program 1 times [2021-12-28 00:08:26,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:08:26,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561605075] [2021-12-28 00:08:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:26,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:08:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:08:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 00:08:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 00:08:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 00:08:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 00:08:26,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:08:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561605075] [2021-12-28 00:08:27,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561605075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:08:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43203123] [2021-12-28 00:08:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:27,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:08:27,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:08:27,001 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:08:27,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 00:08:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 00:08:27,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:08:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 00:08:27,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:08:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 00:08:27,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43203123] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:08:27,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 00:08:27,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2021-12-28 00:08:27,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636502240] [2021-12-28 00:08:27,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 00:08:27,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 00:08:27,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:08:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 00:08:27,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:08:27,356 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:29,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:08:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:08:29,892 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2021-12-28 00:08:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 00:08:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-12-28 00:08:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:08:29,893 INFO L225 Difference]: With dead ends: 99 [2021-12-28 00:08:29,893 INFO L226 Difference]: Without dead ends: 90 [2021-12-28 00:08:29,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-12-28 00:08:29,894 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 101 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-28 00:08:29,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 339 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-28 00:08:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-28 00:08:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 51. [2021-12-28 00:08:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:08:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-12-28 00:08:29,899 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 52 [2021-12-28 00:08:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:08:29,899 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-12-28 00:08:29,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:08:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-12-28 00:08:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 00:08:29,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:08:29,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:08:29,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 00:08:30,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:08:30,106 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:08:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:08:30,106 INFO L85 PathProgramCache]: Analyzing trace with hash -282483074, now seen corresponding path program 1 times [2021-12-28 00:08:30,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:08:30,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615476566] [2021-12-28 00:08:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:30,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:08:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:30,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:08:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:30,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 00:08:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:30,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 00:08:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:30,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 00:08:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 00:08:30,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:08:30,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615476566] [2021-12-28 00:08:30,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615476566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:08:30,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750031643] [2021-12-28 00:08:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:08:30,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:08:30,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:08:30,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:08:30,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 00:08:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:08:30,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-28 00:08:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:08:30,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 00:08:30,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-12-28 00:08:30,472 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 00:08:30,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 00:08:30,500 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_212 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_212) |c_#memory_int|)) is different from true [2021-12-28 00:08:30,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-28 00:08:30,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-28 00:08:30,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-28 00:08:30,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-28 00:08:30,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 00:08:30,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-12-28 00:08:30,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2021-12-28 00:08:31,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2021-12-28 00:08:32,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2021-12-28 00:08:39,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 193 [2021-12-28 00:08:39,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 327 [2021-12-28 00:08:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-12-28 00:08:39,649 INFO L328 TraceCheckSpWp]: Computing backward predicates...