./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_m2.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 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:02:42,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:02:42,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:02:42,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:02:42,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:02:42,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:02:42,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:02:42,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:02:42,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:02:42,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:02:42,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:02:42,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:02:42,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:02:42,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:02:42,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:02:42,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:02:42,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:02:42,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:02:42,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:02:42,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:02:42,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:02:42,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:02:42,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:02:42,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:02:42,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:02:42,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:02:42,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:02:42,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:02:42,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:02:42,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:02:42,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:02:42,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:02:42,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:02:42,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:02:42,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:02:42,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:02:42,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:02:42,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:02:42,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:02:42,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:02:42,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:02:42,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:02:42,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:02:42,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:02:42,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:02:42,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:02:42,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:02:42,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:02:42,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:02:42,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:02:42,757 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:02:42,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:02:42,758 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:02:42,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:02:42,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:02:42,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:02:42,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:02:42,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:02:42,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:02:42,759 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:02:42,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:02:42,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:02:42,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:02:42,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:02:42,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:02:42,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:02:42,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:02:42,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:02:42,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:02:42,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:02:42,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:02:42,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:02:42,761 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:02:42,761 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:02:42,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:02:42,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:02:42,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f [2021-12-21 10:02:42,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:02:42,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:02:42,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:02:42,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:02:42,979 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:02:42,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m2.c [2021-12-21 10:02:43,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbddb662/15d730e8060347c7bdc43c60a21c8036/FLAG66ccb98bd [2021-12-21 10:02:43,335 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:02:43,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2021-12-21 10:02:43,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbddb662/15d730e8060347c7bdc43c60a21c8036/FLAG66ccb98bd [2021-12-21 10:02:43,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbddb662/15d730e8060347c7bdc43c60a21c8036 [2021-12-21 10:02:43,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:02:43,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:02:43,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:02:43,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:02:43,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:02:43,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:43,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42dd07c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43, skipping insertion in model container [2021-12-21 10:02:43,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:43,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:02:43,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:02:43,929 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2021-12-21 10:02:43,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:02:43,945 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:02:43,958 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2021-12-21 10:02:43,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:02:43,988 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:02:43,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43 WrapperNode [2021-12-21 10:02:43,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:02:43,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:02:43,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:02:43,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:02:43,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,018 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-21 10:02:44,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:02:44,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:02:44,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:02:44,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:02:44,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:02:44,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:02:44,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:02:44,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:02:44,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (1/1) ... [2021-12-21 10:02:44,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:02:44,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:44,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:02:44,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 10:02:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:02:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:02:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:02:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:02:44,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:02:44,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:02:44,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:02:44,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:02:44,158 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:02:44,159 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:02:44,250 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:02:44,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:02:44,255 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-21 10:02:44,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:02:44 BoogieIcfgContainer [2021-12-21 10:02:44,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:02:44,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:02:44,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:02:44,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:02:44,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:02:43" (1/3) ... [2021-12-21 10:02:44,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f06937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:02:44, skipping insertion in model container [2021-12-21 10:02:44,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:43" (2/3) ... [2021-12-21 10:02:44,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f06937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:02:44, skipping insertion in model container [2021-12-21 10:02:44,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:02:44" (3/3) ... [2021-12-21 10:02:44,262 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2021-12-21 10:02:44,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:02:44,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:02:44,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:02:44,306 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:02:44,307 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:02:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:02:44,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:44,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:44,336 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2021-12-21 10:02:44,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:44,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945598413] [2021-12-21 10:02:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:44,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:44,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:44,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945598413] [2021-12-21 10:02:44,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945598413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:02:44,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:02:44,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:02:44,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021847147] [2021-12-21 10:02:44,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:02:44,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:02:44,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:02:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:02:44,524 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:44,537 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-12-21 10:02:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:02:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 10:02:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:44,544 INFO L225 Difference]: With dead ends: 47 [2021-12-21 10:02:44,544 INFO L226 Difference]: Without dead ends: 21 [2021-12-21 10:02:44,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:02:44,550 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:44,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:02:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-21 10:02:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-21 10:02:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-21 10:02:44,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-12-21 10:02:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:44,583 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-21 10:02:44,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-21 10:02:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:02:44,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:44,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:44,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:02:44,585 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2021-12-21 10:02:44,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:44,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275544765] [2021-12-21 10:02:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:44,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:44,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:44,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275544765] [2021-12-21 10:02:44,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275544765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:02:44,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:02:44,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:02:44,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213844697] [2021-12-21 10:02:44,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:02:44,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:02:44,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:44,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:02:44,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:02:44,691 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:44,722 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-21 10:02:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:02:44,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 10:02:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:44,723 INFO L225 Difference]: With dead ends: 39 [2021-12-21 10:02:44,724 INFO L226 Difference]: Without dead ends: 23 [2021-12-21 10:02:44,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:02:44,726 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:44,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:02:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-21 10:02:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-21 10:02:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-21 10:02:44,734 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-12-21 10:02:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:44,734 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-21 10:02:44,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-21 10:02:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 10:02:44,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:44,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:44,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:02:44,738 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:44,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2021-12-21 10:02:44,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:44,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519913013] [2021-12-21 10:02:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:44,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:02:44,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:44,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519913013] [2021-12-21 10:02:44,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519913013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:02:44,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:02:44,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:02:44,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203410328] [2021-12-21 10:02:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:02:44,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:02:44,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:44,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:02:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:02:44,808 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:44,869 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-12-21 10:02:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:02:44,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-21 10:02:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:44,870 INFO L225 Difference]: With dead ends: 43 [2021-12-21 10:02:44,870 INFO L226 Difference]: Without dead ends: 30 [2021-12-21 10:02:44,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:02:44,871 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:44,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:02:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-21 10:02:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-12-21 10:02:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-21 10:02:44,877 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-21 10:02:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:44,891 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-21 10:02:44,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-21 10:02:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 10:02:44,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:44,892 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:02:44,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:02:44,893 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:44,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2021-12-21 10:02:44,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:44,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902255325] [2021-12-21 10:02:44,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:44,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:02:44,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902255325] [2021-12-21 10:02:44,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902255325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171552338] [2021-12-21 10:02:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:44,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:44,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:44,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:44,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:02:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:45,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:02:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:02:45,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:02:45,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171552338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:45,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:45,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 10:02:45,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018760153] [2021-12-21 10:02:45,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:45,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:02:45,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:45,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:02:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:02:45,224 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:45,246 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-21 10:02:45,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:02:45,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-21 10:02:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:45,247 INFO L225 Difference]: With dead ends: 49 [2021-12-21 10:02:45,247 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 10:02:45,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:02:45,249 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:45,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:02:45,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 10:02:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-21 10:02:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-21 10:02:45,252 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-12-21 10:02:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:45,253 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-21 10:02:45,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-21 10:02:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:02:45,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:45,254 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:02:45,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 10:02:45,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:45,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2021-12-21 10:02:45,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:45,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960281228] [2021-12-21 10:02:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:45,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 10:02:45,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:45,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960281228] [2021-12-21 10:02:45,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960281228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:45,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238424180] [2021-12-21 10:02:45,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:02:45,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:45,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:45,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:02:45,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:02:45,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:45,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:02:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 10:02:45,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 10:02:45,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238424180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:45,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:45,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 10:02:45,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121243604] [2021-12-21 10:02:45,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:45,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:02:45,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:02:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:02:45,756 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:45,826 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-21 10:02:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:02:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 10:02:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:45,827 INFO L225 Difference]: With dead ends: 56 [2021-12-21 10:02:45,827 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 10:02:45,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:02:45,828 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:45,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:02:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 10:02:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-12-21 10:02:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-21 10:02:45,832 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2021-12-21 10:02:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:45,832 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-21 10:02:45,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-21 10:02:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:02:45,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:45,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:45,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 10:02:46,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:46,047 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2021-12-21 10:02:46,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:46,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720183733] [2021-12-21 10:02:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:46,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:46,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:46,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720183733] [2021-12-21 10:02:46,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720183733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:46,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574177957] [2021-12-21 10:02:46,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:02:46,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:46,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:47,004 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:47,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:02:47,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 10:02:47,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:47,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 10:02:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:47,179 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 15 treesize of output 11 [2021-12-21 10:02:48,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:02:48,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2021-12-21 10:02:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:48,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:56,545 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 68 treesize of output 60 [2021-12-21 10:02:56,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:02:56,560 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 222 treesize of output 197 [2021-12-21 10:02:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:56,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574177957] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:56,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:56,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 29] total 71 [2021-12-21 10:02:56,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951364581] [2021-12-21 10:02:56,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:56,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-21 10:02:56,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-21 10:02:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=4588, Unknown=1, NotChecked=0, Total=4970 [2021-12-21 10:02:56,834 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:59,774 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2021-12-21 10:02:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-21 10:02:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-21 10:02:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:59,776 INFO L225 Difference]: With dead ends: 101 [2021-12-21 10:02:59,776 INFO L226 Difference]: Without dead ends: 95 [2021-12-21 10:02:59,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3392 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=869, Invalid=10686, Unknown=1, NotChecked=0, Total=11556 [2021-12-21 10:02:59,779 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:59,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 163 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 660 Invalid, 0 Unknown, 1204 Unchecked, 0.3s Time] [2021-12-21 10:02:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-21 10:02:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2021-12-21 10:02:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2021-12-21 10:02:59,794 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 35 [2021-12-21 10:02:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:59,794 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2021-12-21 10:02:59,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2021-12-21 10:02:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:02:59,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:59,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:59,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:03:00,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:00,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2021-12-21 10:03:00,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:00,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965175838] [2021-12-21 10:03:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:00,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:03:00,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:00,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965175838] [2021-12-21 10:03:00,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965175838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:03:00,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033167849] [2021-12-21 10:03:00,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:03:00,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:00,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:00,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:03:00,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:03:00,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:03:00,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:03:00,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:03:00,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:03:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:03:00,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:03:00,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033167849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:00,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:00,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:03:00,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55902300] [2021-12-21 10:03:00,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:00,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:03:00,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:00,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:03:00,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:03:00,313 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:00,441 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2021-12-21 10:03:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:03:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-21 10:03:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:00,442 INFO L225 Difference]: With dead ends: 113 [2021-12-21 10:03:00,442 INFO L226 Difference]: Without dead ends: 65 [2021-12-21 10:03:00,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:03:00,443 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:00,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 50 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:03:00,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-21 10:03:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-21 10:03:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-12-21 10:03:00,450 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 37 [2021-12-21 10:03:00,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:00,450 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-12-21 10:03:00,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-12-21 10:03:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 10:03:00,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:00,451 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:03:00,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:03:00,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:00,651 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1270817660, now seen corresponding path program 5 times [2021-12-21 10:03:00,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:00,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578935418] [2021-12-21 10:03:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:00,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:03:00,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:00,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578935418] [2021-12-21 10:03:00,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578935418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:03:00,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692180817] [2021-12-21 10:03:00,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:03:00,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:00,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:00,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:03:00,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:03:00,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 10:03:00,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:03:00,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:03:00,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:03:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:03:00,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:03:00,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692180817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:00,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:00,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:03:00,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410834151] [2021-12-21 10:03:00,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:00,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:03:00,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:03:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:03:00,933 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:01,049 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2021-12-21 10:03:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:03:01,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-21 10:03:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:01,050 INFO L225 Difference]: With dead ends: 99 [2021-12-21 10:03:01,050 INFO L226 Difference]: Without dead ends: 62 [2021-12-21 10:03:01,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-21 10:03:01,054 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:01,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 29 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:03:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-21 10:03:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-12-21 10:03:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-21 10:03:01,058 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2021-12-21 10:03:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:01,058 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-21 10:03:01,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-21 10:03:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 10:03:01,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:01,059 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:03:01,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:03:01,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:01,272 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2021-12-21 10:03:01,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970926974] [2021-12-21 10:03:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:01,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:03:02,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970926974] [2021-12-21 10:03:02,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970926974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:03:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369635014] [2021-12-21 10:03:02,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 10:03:02,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:02,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:02,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:03:02,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:03:02,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-21 10:03:02,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:03:02,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-21 10:03:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:03:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:03:04,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:25,107 INFO L353 Elim1Store]: treesize reduction 72, result has 68.8 percent of original size [2021-12-21 10:03:25,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 181 [2021-12-21 10:03:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:03:31,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369635014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:31,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:31,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 93 [2021-12-21 10:03:31,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988652508] [2021-12-21 10:03:31,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:31,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-12-21 10:03:31,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:31,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-12-21 10:03:31,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=7866, Unknown=4, NotChecked=0, Total=8556 [2021-12-21 10:03:31,384 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:32,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:32,661 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-21 10:03:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-21 10:03:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-21 10:03:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:32,665 INFO L225 Difference]: With dead ends: 79 [2021-12-21 10:03:32,666 INFO L226 Difference]: Without dead ends: 75 [2021-12-21 10:03:32,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=967, Invalid=10801, Unknown=4, NotChecked=0, Total=11772 [2021-12-21 10:03:32,668 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 543 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:32,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 665 Invalid, 0 Unknown, 543 Unchecked, 0.3s Time] [2021-12-21 10:03:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-21 10:03:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-12-21 10:03:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-12-21 10:03:32,674 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2021-12-21 10:03:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:32,674 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-12-21 10:03:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-12-21 10:03:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 10:03:32,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:32,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:03:32,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:03:32,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:32,892 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2021-12-21 10:03:32,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:32,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494660601] [2021-12-21 10:03:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:32,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 10:03:32,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494660601] [2021-12-21 10:03:32,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494660601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:03:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047833565] [2021-12-21 10:03:32,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 10:03:32,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:32,958 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:03:32,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:03:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:33,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:03:33,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:03:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 10:03:33,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 10:03:33,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047833565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:33,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:33,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-21 10:03:33,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010654922] [2021-12-21 10:03:33,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:33,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:03:33,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:03:33,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:03:33,209 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:33,343 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2021-12-21 10:03:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:03:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-21 10:03:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:33,344 INFO L225 Difference]: With dead ends: 132 [2021-12-21 10:03:33,344 INFO L226 Difference]: Without dead ends: 70 [2021-12-21 10:03:33,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-12-21 10:03:33,345 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:33,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 60 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:03:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-21 10:03:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-12-21 10:03:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-12-21 10:03:33,351 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2021-12-21 10:03:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:33,355 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-12-21 10:03:33,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-12-21 10:03:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 10:03:33,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:33,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:03:33,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:03:33,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:33,568 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2021-12-21 10:03:33,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:33,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718863621] [2021-12-21 10:03:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:33,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 10:03:33,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:33,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718863621] [2021-12-21 10:03:33,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718863621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:03:33,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474499616] [2021-12-21 10:03:33,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:03:33,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:33,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:33,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:03:33,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:03:33,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:03:33,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:03:33,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:03:33,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:03:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 10:03:33,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 10:03:33,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474499616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:33,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:33,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-21 10:03:33,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635319368] [2021-12-21 10:03:33,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:33,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:03:33,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:33,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:03:33,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:03:33,896 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:34,069 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-12-21 10:03:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:03:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-21 10:03:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:34,096 INFO L225 Difference]: With dead ends: 101 [2021-12-21 10:03:34,096 INFO L226 Difference]: Without dead ends: 60 [2021-12-21 10:03:34,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:03:34,097 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:34,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 38 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:03:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-21 10:03:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-12-21 10:03:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-21 10:03:34,101 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2021-12-21 10:03:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:34,101 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-21 10:03:34,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-21 10:03:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 10:03:34,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:34,104 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:03:34,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 10:03:34,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 10:03:34,315 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:34,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2021-12-21 10:03:34,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:34,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956112487] [2021-12-21 10:03:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:34,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:03:36,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:36,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956112487] [2021-12-21 10:03:36,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956112487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:03:36,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307619299] [2021-12-21 10:03:36,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:03:36,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:36,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:36,060 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:03:36,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:03:36,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 10:03:36,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:03:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-21 10:03:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:03:36,176 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 15 treesize of output 11 [2021-12-21 10:03:41,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:03:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:03:41,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:03:41,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:03:41,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 53 [2021-12-21 10:03:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:03:42,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:03:51,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307619299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:51,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:51,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 40, 38] total 116 [2021-12-21 10:03:51,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859655473] [2021-12-21 10:03:51,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:51,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-21 10:03:51,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-21 10:03:51,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=12695, Unknown=1, NotChecked=0, Total=13340 [2021-12-21 10:03:51,780 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)