./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/pcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/pcompf.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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:37:21,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:37:21,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:37:21,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:37:21,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:37:21,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:37:21,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:37:21,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:37:21,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:37:21,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:37:21,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:37:21,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:37:21,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:37:21,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:37:21,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:37:21,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:37:21,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:37:21,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:37:21,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:37:21,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:37:21,714 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:37:21,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:37:21,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:37:21,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:37:21,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:37:21,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:37:21,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:37:21,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:37:21,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:37:21,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:37:21,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:37:21,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:37:21,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:37:21,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:37:21,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:37:21,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:37:21,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:37:21,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:37:21,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:37:21,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:37:21,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:37:21,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:37:21,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:37:21,752 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:37:21,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:37:21,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:37:21,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:37:21,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:37:21,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:37:21,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:37:21,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:37:21,754 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:37:21,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:37:21,755 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:37:21,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:37:21,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:37:21,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:37:21,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:37:21,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:37:21,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:37:21,756 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:37:21,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:37:21,757 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:37:21,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:37:21,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:37:21,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:37:21,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:37:21,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:37:21,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:37:21,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:37:21,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:37:21,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:37:21,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:37:21,758 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:37:21,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:37:21,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:37:21,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2022-07-19 10:37:21,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:37:21,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:37:21,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:37:21,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:37:21,975 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:37:21,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/pcompf.c [2022-07-19 10:37:22,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51c118bc/dd95851907574bd9bf3d45f719d6e811/FLAGe4ea7b223 [2022-07-19 10:37:22,345 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:37:22,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/pcompf.c [2022-07-19 10:37:22,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51c118bc/dd95851907574bd9bf3d45f719d6e811/FLAGe4ea7b223 [2022-07-19 10:37:22,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51c118bc/dd95851907574bd9bf3d45f719d6e811 [2022-07-19 10:37:22,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:37:22,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:37:22,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:37:22,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:37:22,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:37:22,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:22,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500d466a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22, skipping insertion in model container [2022-07-19 10:37:22,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:22,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:37:22,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:37:22,912 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-fpi/pcompf.c[589,602] [2022-07-19 10:37:22,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:37:22,929 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:37:22,936 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-fpi/pcompf.c[589,602] [2022-07-19 10:37:22,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:37:22,949 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:37:22,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22 WrapperNode [2022-07-19 10:37:22,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:37:22,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:37:22,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:37:22,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:37:22,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:22,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:22,987 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2022-07-19 10:37:22,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:37:22,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:37:22,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:37:22,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:37:22,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:22,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:22,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:22,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:23,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:23,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:23,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:23,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:37:23,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:37:23,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:37:23,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:37:23,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (1/1) ... [2022-07-19 10:37:23,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:37:23,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:23,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 10:37:23,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 10:37:23,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:37:23,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:37:23,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:37:23,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:37:23,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:37:23,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:37:23,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:37:23,107 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:37:23,108 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:37:23,224 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:37:23,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:37:23,228 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 10:37:23,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:37:23 BoogieIcfgContainer [2022-07-19 10:37:23,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:37:23,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:37:23,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:37:23,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:37:23,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:37:22" (1/3) ... [2022-07-19 10:37:23,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c2e495c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:37:23, skipping insertion in model container [2022-07-19 10:37:23,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:37:22" (2/3) ... [2022-07-19 10:37:23,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c2e495c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:37:23, skipping insertion in model container [2022-07-19 10:37:23,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:37:23" (3/3) ... [2022-07-19 10:37:23,236 INFO L111 eAbstractionObserver]: Analyzing ICFG pcompf.c [2022-07-19 10:37:23,245 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:37:23,245 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:37:23,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:37:23,282 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@644e120a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@17a99293 [2022-07-19 10:37:23,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:37:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:37:23,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:23,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:23,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:23,317 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2022-07-19 10:37:23,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:23,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321046708] [2022-07-19 10:37:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:23,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:37:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:23,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321046708] [2022-07-19 10:37:23,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321046708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:37:23,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:37:23,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:37:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791185303] [2022-07-19 10:37:23,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:37:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:37:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:23,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:37:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:37:23,482 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:23,494 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-07-19 10:37:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:37:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:37:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:23,506 INFO L225 Difference]: With dead ends: 44 [2022-07-19 10:37:23,506 INFO L226 Difference]: Without dead ends: 20 [2022-07-19 10:37:23,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:37:23,510 INFO L413 NwaCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:23,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:37:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-19 10:37:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-19 10:37:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-19 10:37:23,530 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-07-19 10:37:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:23,531 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-19 10:37:23,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-19 10:37:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:37:23,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:23,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:23,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:37:23,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:23,533 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2022-07-19 10:37:23,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:23,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860558142] [2022-07-19 10:37:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:23,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:23,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:23,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374538602] [2022-07-19 10:37:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:23,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:23,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:23,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:23,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:37:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:37:23,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:37:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:23,766 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-07-19 10:37:23,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2022-07-19 10:37:23,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:23,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:23,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:23,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:23,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:23,920 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-07-19 10:37:23,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 94 [2022-07-19 10:37:23,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:23,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:23,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:23,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:23,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 86 [2022-07-19 10:37:23,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:24,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 10:37:24,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:24,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:37:24,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:24,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860558142] [2022-07-19 10:37:24,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:24,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374538602] [2022-07-19 10:37:24,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374538602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:37:24,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:37:24,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:37:24,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213944840] [2022-07-19 10:37:24,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:37:24,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:37:24,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:37:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:37:24,173 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:24,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:24,223 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-07-19 10:37:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:37:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:37:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:24,225 INFO L225 Difference]: With dead ends: 39 [2022-07-19 10:37:24,225 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:37:24,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:37:24,229 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:24,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 59 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:37:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:37:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-07-19 10:37:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-19 10:37:24,238 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 14 [2022-07-19 10:37:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:24,239 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-19 10:37:24,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-19 10:37:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 10:37:24,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:24,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:24,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:24,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:24,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:24,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1850906398, now seen corresponding path program 1 times [2022-07-19 10:37:24,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:24,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214266573] [2022-07-19 10:37:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:24,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:24,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:24,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708638140] [2022-07-19 10:37:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:24,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:24,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:24,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:37:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:37:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:37:24,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:24,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:37:24,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:24,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214266573] [2022-07-19 10:37:24,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:24,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708638140] [2022-07-19 10:37:24,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708638140] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:37:24,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:37:24,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:37:24,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008028052] [2022-07-19 10:37:24,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:37:24,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:37:24,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:37:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:37:24,567 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:24,629 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-07-19 10:37:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:37:24,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 10:37:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:24,632 INFO L225 Difference]: With dead ends: 62 [2022-07-19 10:37:24,633 INFO L226 Difference]: Without dead ends: 50 [2022-07-19 10:37:24,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:37:24,634 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:24,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:37:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-19 10:37:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2022-07-19 10:37:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-19 10:37:24,639 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2022-07-19 10:37:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:24,640 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-19 10:37:24,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-19 10:37:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 10:37:24,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:24,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:24,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:24,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 10:37:24,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:24,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1060218526, now seen corresponding path program 1 times [2022-07-19 10:37:24,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:24,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511524771] [2022-07-19 10:37:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:24,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:24,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:24,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498586126] [2022-07-19 10:37:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:24,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:24,894 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:24,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:37:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:37:24,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:37:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:24,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:24,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:24,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511524771] [2022-07-19 10:37:24,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:24,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498586126] [2022-07-19 10:37:24,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498586126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:24,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:24,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-19 10:37:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133190258] [2022-07-19 10:37:24,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:24,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:37:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:37:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:37:24,978 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:25,058 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-19 10:37:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:37:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 10:37:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:25,059 INFO L225 Difference]: With dead ends: 53 [2022-07-19 10:37:25,059 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 10:37:25,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:37:25,060 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:25,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 44 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:37:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 10:37:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-07-19 10:37:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-19 10:37:25,064 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2022-07-19 10:37:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:25,065 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-19 10:37:25,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-19 10:37:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 10:37:25,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:25,065 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:25,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 10:37:25,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:25,284 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:25,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1120615462, now seen corresponding path program 1 times [2022-07-19 10:37:25,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:25,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230780490] [2022-07-19 10:37:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:25,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:25,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:25,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010875526] [2022-07-19 10:37:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:25,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:25,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:25,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:25,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:37:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:37:25,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 10:37:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:25,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:37:25,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230780490] [2022-07-19 10:37:25,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010875526] [2022-07-19 10:37:25,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010875526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:37:25,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:37:25,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:37:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310786898] [2022-07-19 10:37:25,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:37:25,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:37:25,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:25,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:37:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:37:25,433 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:25,493 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-19 10:37:25,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:37:25,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2022-07-19 10:37:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:25,494 INFO L225 Difference]: With dead ends: 48 [2022-07-19 10:37:25,494 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 10:37:25,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:37:25,495 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:25,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 34 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:37:25,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 10:37:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-19 10:37:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2022-07-19 10:37:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-19 10:37:25,498 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2022-07-19 10:37:25,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:25,498 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-19 10:37:25,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:25,498 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-19 10:37:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:37:25,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:25,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:25,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:25,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2022-07-19 10:37:25,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:25,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143584502] [2022-07-19 10:37:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:25,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:25,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:25,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923070400] [2022-07-19 10:37:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:25,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:25,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:25,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:25,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:37:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:37:25,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 10:37:25,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:25,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:37:25,878 INFO L356 Elim1Store]: treesize reduction 78, result has 41.4 percent of original size [2022-07-19 10:37:25,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 272 [2022-07-19 10:37:25,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:25,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:25,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:26,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:26,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:26,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:26,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 17 [2022-07-19 10:37:26,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:26,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:26,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:26,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:26,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:26,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 17 [2022-07-19 10:37:26,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:26,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:26,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:26,645 INFO L356 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2022-07-19 10:37:26,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 158 [2022-07-19 10:37:26,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:26,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:26,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:26,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2022-07-19 10:37:26,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 10:37:26,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:26,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 10:37:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:26,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:26,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:26,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143584502] [2022-07-19 10:37:26,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:26,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923070400] [2022-07-19 10:37:26,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923070400] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:26,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:26,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-19 10:37:26,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763355233] [2022-07-19 10:37:26,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:26,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 10:37:26,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:26,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 10:37:26,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=151, Unknown=1, NotChecked=0, Total=210 [2022-07-19 10:37:26,976 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:27,058 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-07-19 10:37:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:37:27,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:37:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:27,059 INFO L225 Difference]: With dead ends: 52 [2022-07-19 10:37:27,059 INFO L226 Difference]: Without dead ends: 50 [2022-07-19 10:37:27,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=218, Unknown=1, NotChecked=0, Total=306 [2022-07-19 10:37:27,060 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:27,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 155 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 88 Invalid, 0 Unknown, 99 Unchecked, 0.0s Time] [2022-07-19 10:37:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-19 10:37:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2022-07-19 10:37:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-19 10:37:27,064 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2022-07-19 10:37:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:27,064 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-19 10:37:27,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-19 10:37:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:37:27,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:27,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:27,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:27,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:27,275 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash 859342364, now seen corresponding path program 2 times [2022-07-19 10:37:27,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:27,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806180586] [2022-07-19 10:37:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:27,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:27,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:27,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861529586] [2022-07-19 10:37:27,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:37:27,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:27,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:27,317 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:27,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:37:27,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:37:27,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:37:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:37:27,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:37:27,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:37:27,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:27,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806180586] [2022-07-19 10:37:27,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:27,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861529586] [2022-07-19 10:37:27,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861529586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:27,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:27,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:37:27,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241091978] [2022-07-19 10:37:27,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:27,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:37:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:37:27,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:37:27,468 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-07-19 10:37:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:27,567 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-07-19 10:37:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:37:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 22 [2022-07-19 10:37:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:27,568 INFO L225 Difference]: With dead ends: 81 [2022-07-19 10:37:27,569 INFO L226 Difference]: Without dead ends: 68 [2022-07-19 10:37:27,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:37:27,569 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:27,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 44 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:37:27,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-19 10:37:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 42. [2022-07-19 10:37:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-19 10:37:27,574 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2022-07-19 10:37:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:27,574 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-19 10:37:27,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-07-19 10:37:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-19 10:37:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:37:27,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:27,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:27,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:27,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:27,796 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:27,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash 803751580, now seen corresponding path program 3 times [2022-07-19 10:37:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:27,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289898663] [2022-07-19 10:37:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:27,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:27,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:27,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266847191] [2022-07-19 10:37:27,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:37:27,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:27,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:27,821 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) [2022-07-19 10:37:27,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:37:27,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:37:27,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:37:27,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:37:27,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:37:27,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:37:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289898663] [2022-07-19 10:37:27,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266847191] [2022-07-19 10:37:27,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266847191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:27,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:27,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:37:27,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441506926] [2022-07-19 10:37:27,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:27,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:37:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:27,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:37:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:37:27,937 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-07-19 10:37:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:28,042 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-07-19 10:37:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:37:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 22 [2022-07-19 10:37:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:28,043 INFO L225 Difference]: With dead ends: 71 [2022-07-19 10:37:28,043 INFO L226 Difference]: Without dead ends: 60 [2022-07-19 10:37:28,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:37:28,043 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:28,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 56 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:37:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-19 10:37:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2022-07-19 10:37:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-07-19 10:37:28,047 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2022-07-19 10:37:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:28,048 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-07-19 10:37:28,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-07-19 10:37:28,048 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-07-19 10:37:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:37:28,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:28,048 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:28,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:28,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:28,266 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2022-07-19 10:37:28,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:28,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856359262] [2022-07-19 10:37:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:28,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:28,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:28,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355326576] [2022-07-19 10:37:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:28,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:28,310 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) [2022-07-19 10:37:28,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:37:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:37:28,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 10:37:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:28,406 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:28,406 INFO L390 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 23 treesize of output 19 [2022-07-19 10:37:28,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:28,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:28,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:28,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-07-19 10:37:28,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:28,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:28,464 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:28,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-07-19 10:37:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:28,519 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:28,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-07-19 10:37:28,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:28,548 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:28,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-07-19 10:37:28,667 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 10:37:28,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 32 [2022-07-19 10:37:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:28,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:28,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:28,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856359262] [2022-07-19 10:37:28,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355326576] [2022-07-19 10:37:28,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355326576] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:28,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:28,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2022-07-19 10:37:28,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723913163] [2022-07-19 10:37:28,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:28,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 10:37:28,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:28,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 10:37:28,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=207, Unknown=12, NotChecked=0, Total=272 [2022-07-19 10:37:28,863 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:28,981 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-07-19 10:37:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:37:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:37:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:28,982 INFO L225 Difference]: With dead ends: 46 [2022-07-19 10:37:28,982 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 10:37:28,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=280, Unknown=13, NotChecked=0, Total=380 [2022-07-19 10:37:28,982 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:28,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 110 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 67 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-07-19 10:37:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 10:37:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-19 10:37:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-07-19 10:37:28,986 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 24 [2022-07-19 10:37:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:28,986 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-07-19 10:37:28,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-07-19 10:37:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 10:37:28,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:28,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:29,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:29,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 10:37:29,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:29,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 4 times [2022-07-19 10:37:29,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:29,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103299157] [2022-07-19 10:37:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:29,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:29,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:29,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082568303] [2022-07-19 10:37:29,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:37:29,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:29,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:29,221 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) [2022-07-19 10:37:29,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:37:29,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:37:29,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:37:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 10:37:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:29,392 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-07-19 10:37:29,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-07-19 10:37:29,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:29,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:29,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:29,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:29,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:29,501 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-07-19 10:37:29,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 94 [2022-07-19 10:37:29,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:29,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:29,555 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-19 10:37:29,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 84 [2022-07-19 10:37:29,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:29,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:29,638 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-19 10:37:29,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 23 [2022-07-19 10:37:29,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:29,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:29,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 11 [2022-07-19 10:37:29,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:29,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-07-19 10:37:29,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:29,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:29,714 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-19 10:37:29,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 56 [2022-07-19 10:37:29,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:29,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:37:29,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:37:29,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:37:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:29,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 10:37:29,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:29,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 10:37:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:37:29,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:31,918 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_68| Int)) (or (forall ((v_ArrVal_576 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_68|)))) is different from false [2022-07-19 10:37:32,901 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_576 Int) (v_ArrVal_575 Int) (|v_ULTIMATE.start_main_~i~0#1_68| Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_68|)))) is different from false [2022-07-19 10:37:32,917 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_576 Int) (v_ArrVal_575 Int) (|v_ULTIMATE.start_main_~i~0#1_68| Int) (v_ArrVal_573 (Array Int Int))) (or (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_68|)) (= 0 (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_573) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|)))) is different from false [2022-07-19 10:37:32,954 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_576 Int) (v_ArrVal_575 Int) (|v_ULTIMATE.start_main_~i~0#1_68| Int) (v_ArrVal_571 (Array Int Int)) (v_ArrVal_573 (Array Int Int))) (or (= (select (store (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_571) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_573) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_68|)))) is different from false [2022-07-19 10:37:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 7 not checked. [2022-07-19 10:37:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103299157] [2022-07-19 10:37:32,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082568303] [2022-07-19 10:37:32,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082568303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:32,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:32,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-07-19 10:37:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847452455] [2022-07-19 10:37:32,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:32,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 10:37:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:32,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 10:37:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=134, Unknown=7, NotChecked=108, Total=306 [2022-07-19 10:37:32,975 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:33,098 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_576 Int) (v_ArrVal_575 Int) (|v_ULTIMATE.start_main_~i~0#1_68| Int) (v_ArrVal_573 (Array Int Int))) (or (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_68|)) (= 0 (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_573) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (forall ((v_ArrVal_576 Int) (v_ArrVal_575 Int) (|v_ULTIMATE.start_main_~i~0#1_68| Int) (v_ArrVal_571 (Array Int Int)) (v_ArrVal_573 (Array Int Int))) (or (= (select (store (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_571) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_573) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_68|))))) is different from false [2022-07-19 10:37:35,122 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_68| Int)) (or (forall ((v_ArrVal_576 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_68|)))) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-07-19 10:37:35,125 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_576 Int) (v_ArrVal_575 Int) (|v_ULTIMATE.start_main_~i~0#1_68| Int) (v_ArrVal_573 (Array Int Int))) (or (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_68|)) (= 0 (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_573) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (forall ((v_ArrVal_576 Int) (v_ArrVal_575 Int) (|v_ULTIMATE.start_main_~i~0#1_68| Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_68|))))) is different from false [2022-07-19 10:37:37,146 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_68| Int)) (or (forall ((v_ArrVal_576 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_68|))))) is different from false [2022-07-19 10:37:39,148 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_68| Int)) (or (forall ((v_ArrVal_576 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_68| 8)) v_ArrVal_576) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_68|))))) is different from false [2022-07-19 10:37:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:39,189 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-07-19 10:37:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 10:37:39,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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 26 [2022-07-19 10:37:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:39,190 INFO L225 Difference]: With dead ends: 73 [2022-07-19 10:37:39,190 INFO L226 Difference]: Without dead ends: 71 [2022-07-19 10:37:39,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=115, Invalid=287, Unknown=14, NotChecked=396, Total=812 [2022-07-19 10:37:39,191 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:39,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 95 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 143 Unchecked, 0.0s Time] [2022-07-19 10:37:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-19 10:37:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-07-19 10:37:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-07-19 10:37:39,196 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 26 [2022-07-19 10:37:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:39,196 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-07-19 10:37:39,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-07-19 10:37:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:37:39,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:39,197 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:39,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:39,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 10:37:39,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash -231193078, now seen corresponding path program 2 times [2022-07-19 10:37:39,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:39,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695423897] [2022-07-19 10:37:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:39,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:39,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:39,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081701083] [2022-07-19 10:37:39,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:37:39,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:39,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:39,441 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:39,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:37:39,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:37:39,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:37:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 10:37:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:37:39,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:37:39,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:39,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695423897] [2022-07-19 10:37:39,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:39,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081701083] [2022-07-19 10:37:39,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081701083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:39,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:39,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-19 10:37:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958905956] [2022-07-19 10:37:39,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:39,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:37:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:37:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:37:39,634 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:39,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:39,738 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2022-07-19 10:37:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:37:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 10:37:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:39,739 INFO L225 Difference]: With dead ends: 87 [2022-07-19 10:37:39,739 INFO L226 Difference]: Without dead ends: 63 [2022-07-19 10:37:39,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:37:39,740 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:39,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:37:39,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-19 10:37:39,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2022-07-19 10:37:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-19 10:37:39,751 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 28 [2022-07-19 10:37:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:39,751 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-19 10:37:39,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-19 10:37:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:37:39,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:39,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:39,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 10:37:39,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 10:37:39,972 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:39,973 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 3 times [2022-07-19 10:37:39,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:39,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123930300] [2022-07-19 10:37:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:39,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:39,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:39,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554198855] [2022-07-19 10:37:39,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:37:39,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:39,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:40,013 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:40,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 10:37:40,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:37:40,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:37:40,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-19 10:37:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:40,142 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:40,142 INFO L390 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 23 treesize of output 19 [2022-07-19 10:37:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-07-19 10:37:40,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:40,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:40,185 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:40,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-07-19 10:37:40,207 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:40,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-07-19 10:37:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,253 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:40,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-07-19 10:37:40,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,278 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:40,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-07-19 10:37:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:40,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:40,310 INFO L356 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-07-19 10:37:40,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 57 [2022-07-19 10:37:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:40,357 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 10:37:40,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 46 [2022-07-19 10:37:40,454 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 10:37:40,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 34 [2022-07-19 10:37:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:37:40,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:42,642 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_97| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_97|)) (forall ((v_ArrVal_723 Int)) (= (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_97| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_723))) (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) 1)))) is different from false [2022-07-19 10:37:43,237 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_720 Int) (|v_ULTIMATE.start_main_~i~0#1_97| Int) (v_ArrVal_723 Int)) (or (= (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_720) (+ (* |v_ULTIMATE.start_main_~i~0#1_97| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_723))) (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) 1) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_97|)))) is different from false [2022-07-19 10:37:43,656 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_720 Int) (|v_ULTIMATE.start_main_~i~0#1_97| Int) (v_ArrVal_723 Int)) (or (= (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_720) (+ (* |v_ULTIMATE.start_main_~i~0#1_97| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_723))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_97|)))) is different from false [2022-07-19 10:37:43,680 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_720 Int) (v_ArrVal_719 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_97| Int) (v_ArrVal_723 Int)) (or (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_719))) (let ((.cse0 (store (store (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_720) (+ (* |v_ULTIMATE.start_main_~i~0#1_97| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_723))) (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_97|)))) is different from false [2022-07-19 10:37:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-07-19 10:37:43,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123930300] [2022-07-19 10:37:43,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554198855] [2022-07-19 10:37:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554198855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:43,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:43,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2022-07-19 10:37:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748921035] [2022-07-19 10:37:43,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 10:37:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 10:37:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=283, Unknown=4, NotChecked=148, Total=506 [2022-07-19 10:37:43,706 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:45,946 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_97| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_97|)) (forall ((v_ArrVal_723 Int)) (= (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_97| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_723))) (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) 1)))) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-07-19 10:37:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:46,071 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2022-07-19 10:37:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 10:37:46,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-19 10:37:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:46,073 INFO L225 Difference]: With dead ends: 88 [2022-07-19 10:37:46,073 INFO L226 Difference]: Without dead ends: 86 [2022-07-19 10:37:46,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=124, Invalid=491, Unknown=5, NotChecked=250, Total=870 [2022-07-19 10:37:46,073 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:46,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 113 Unchecked, 0.0s Time] [2022-07-19 10:37:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-19 10:37:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-07-19 10:37:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2) internal successors, (90), 75 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-07-19 10:37:46,080 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 30 [2022-07-19 10:37:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:46,080 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-07-19 10:37:46,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-07-19 10:37:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:37:46,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:46,081 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:46,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:46,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 10:37:46,302 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1792212012, now seen corresponding path program 5 times [2022-07-19 10:37:46,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:46,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134437936] [2022-07-19 10:37:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:46,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:46,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:46,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849007414] [2022-07-19 10:37:46,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:37:46,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:46,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:46,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:46,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 10:37:46,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 10:37:46,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:37:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:37:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:37:46,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:37:46,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:46,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134437936] [2022-07-19 10:37:46,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:46,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849007414] [2022-07-19 10:37:46,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849007414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:46,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:46,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-19 10:37:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545250713] [2022-07-19 10:37:46,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:46,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:37:46,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:37:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:37:46,568 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:46,694 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2022-07-19 10:37:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:37:46,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 30 [2022-07-19 10:37:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:46,695 INFO L225 Difference]: With dead ends: 127 [2022-07-19 10:37:46,695 INFO L226 Difference]: Without dead ends: 93 [2022-07-19 10:37:46,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-19 10:37:46,695 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:46,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 57 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:37:46,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-19 10:37:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2022-07-19 10:37:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-07-19 10:37:46,700 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 30 [2022-07-19 10:37:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:46,701 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-07-19 10:37:46,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-07-19 10:37:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 10:37:46,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:46,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:46,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:46,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 10:37:46,902 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:46,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 6 times [2022-07-19 10:37:46,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:46,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620352106] [2022-07-19 10:37:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:46,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:46,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834764460] [2022-07-19 10:37:46,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:37:46,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:46,924 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:46,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 10:37:47,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 10:37:47,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:37:47,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 10:37:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:47,144 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-07-19 10:37:47,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2022-07-19 10:37:47,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:47,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:47,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-19 10:37:47,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:47,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 11 [2022-07-19 10:37:47,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:47,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:47,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:47,704 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-19 10:37:47,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 53 [2022-07-19 10:37:47,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:47,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:47,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:47,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:47,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-07-19 10:37:48,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-19 10:37:48,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:37:48,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:37:48,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:37:48,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:37:48,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:37:48,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 10:37:48,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:48,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 10:37:48,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:48,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 10:37:48,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:48,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 10:37:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 10:37:48,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:50,226 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_123| Int)) (or (forall ((v_ArrVal_908 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_123|)))) is different from false [2022-07-19 10:37:52,075 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_908 Int) (|v_ULTIMATE.start_main_~i~0#1_123| Int) (v_ArrVal_905 Int) (v_ArrVal_903 Int)) (or (not (<= 3 |v_ULTIMATE.start_main_~i~0#1_123|)) (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_903) (+ 16 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_905) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0))) is different from false [2022-07-19 10:37:52,089 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_902 (Array Int Int)) (v_ArrVal_908 Int) (|v_ULTIMATE.start_main_~i~0#1_123| Int) (v_ArrVal_905 Int) (v_ArrVal_903 Int)) (or (= 0 (select (store (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_902) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_903) (+ 16 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_905) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|)) (not (<= 3 |v_ULTIMATE.start_main_~i~0#1_123|)))) is different from false [2022-07-19 10:37:52,130 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array Int Int)) (v_ArrVal_902 (Array Int Int)) (v_ArrVal_908 Int) (|v_ULTIMATE.start_main_~i~0#1_123| Int) (v_ArrVal_905 Int) (v_ArrVal_903 Int)) (or (not (<= 3 |v_ULTIMATE.start_main_~i~0#1_123|)) (= (select (store (store (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_899) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_902) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_903) (+ 16 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_905) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0))) is different from false [2022-07-19 10:37:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 1 times theorem prover too weak. 8 trivial. 12 not checked. [2022-07-19 10:37:52,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:52,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620352106] [2022-07-19 10:37:52,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:52,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834764460] [2022-07-19 10:37:52,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834764460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:52,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:52,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-07-19 10:37:52,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227374490] [2022-07-19 10:37:52,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:52,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 10:37:52,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:52,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 10:37:52,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=216, Unknown=8, NotChecked=140, Total=462 [2022-07-19 10:37:52,163 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:54,230 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_22 (Array Int Int))) (and (= (select v_DerPreprocessor_22 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (let ((.cse0 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0))) (or (and .cse0 (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (v_DerPreprocessor_32 (Array Int Int)) (v_DerPreprocessor_33 (Array Int Int)) (v_DerPreprocessor_34 (Array Int Int))) (let ((.cse3 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_32) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_33) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_34) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_32) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_33) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_34))) (let ((.cse2 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_20) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_21) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_22) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_20) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_21) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_22))) (and (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) (= (select v_DerPreprocessor_34 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) (= v_DerPreprocessor_21 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|)) (= v_DerPreprocessor_33 (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|))))))) (and .cse0 (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_123| Int)) (or (forall ((v_ArrVal_908 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_123|)))) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-07-19 10:37:56,240 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= 2 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_123| Int)) (or (forall ((v_ArrVal_908 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_123|))))) is different from false [2022-07-19 10:37:58,268 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (forall ((v_ArrVal_908 Int) (|v_ULTIMATE.start_main_~i~0#1_123| Int) (v_ArrVal_905 Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_905) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) |v_ULTIMATE.start_main_~i~0#1_123|)))) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_123| Int)) (or (forall ((v_ArrVal_908 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_123|))))) is different from false [2022-07-19 10:38:00,323 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_908 Int) (|v_ULTIMATE.start_main_~i~0#1_123| Int) (v_ArrVal_905 Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_905) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) |v_ULTIMATE.start_main_~i~0#1_123|)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_123| Int)) (or (forall ((v_ArrVal_908 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_123|))))) is different from false [2022-07-19 10:38:02,326 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_123| Int)) (or (forall ((v_ArrVal_908 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_123|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_908) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_123|))))) is different from false [2022-07-19 10:38:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:38:02,341 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2022-07-19 10:38:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 10:38:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-19 10:38:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:38:02,342 INFO L225 Difference]: With dead ends: 80 [2022-07-19 10:38:02,342 INFO L226 Difference]: Without dead ends: 78 [2022-07-19 10:38:02,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=134, Invalid=309, Unknown=13, NotChecked=414, Total=870 [2022-07-19 10:38:02,354 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:38:02,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 93 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2022-07-19 10:38:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-19 10:38:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2022-07-19 10:38:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:38:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-07-19 10:38:02,359 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 32 [2022-07-19 10:38:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:38:02,359 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-07-19 10:38:02,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:38:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-07-19 10:38:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 10:38:02,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:38:02,360 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:38:02,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 10:38:02,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 10:38:02,560 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:38:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:38:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash 505093188, now seen corresponding path program 4 times [2022-07-19 10:38:02,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:38:02,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70542805] [2022-07-19 10:38:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:38:02,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:38:02,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:38:02,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351289234] [2022-07-19 10:38:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:38:02,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:38:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:38:02,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:38:02,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 10:38:02,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:38:02,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-19 10:38:02,693 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 10:38:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 10:38:02,748 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 10:38:02,748 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 10:38:02,749 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 10:38:02,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 10:38:02,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:38:02,953 INFO L356 BasicCegarLoop]: Path program histogram: [6, 4, 1, 1, 1, 1, 1] [2022-07-19 10:38:02,964 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 10:38:02,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 10:38:02 BoogieIcfgContainer [2022-07-19 10:38:02,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 10:38:02,988 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 10:38:02,988 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 10:38:02,989 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 10:38:02,989 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:37:23" (3/4) ... [2022-07-19 10:38:02,990 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 10:38:03,040 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 10:38:03,046 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 10:38:03,047 INFO L158 Benchmark]: Toolchain (without parser) took 40274.38ms. Allocated memory was 119.5MB in the beginning and 218.1MB in the end (delta: 98.6MB). Free memory was 90.4MB in the beginning and 165.7MB in the end (delta: -75.3MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. [2022-07-19 10:38:03,047 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 119.5MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 10:38:03,047 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.88ms. Allocated memory is still 119.5MB. Free memory was 90.1MB in the beginning and 93.4MB in the end (delta: -3.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 10:38:03,047 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.85ms. Allocated memory is still 119.5MB. Free memory was 93.4MB in the beginning and 91.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 10:38:03,048 INFO L158 Benchmark]: Boogie Preprocessor took 14.61ms. Allocated memory is still 119.5MB. Free memory was 91.7MB in the beginning and 90.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 10:38:03,048 INFO L158 Benchmark]: RCFGBuilder took 225.20ms. Allocated memory is still 119.5MB. Free memory was 90.4MB in the beginning and 79.0MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 10:38:03,048 INFO L158 Benchmark]: TraceAbstraction took 39757.38ms. Allocated memory was 119.5MB in the beginning and 218.1MB in the end (delta: 98.6MB). Free memory was 78.4MB in the beginning and 168.8MB in the end (delta: -90.4MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2022-07-19 10:38:03,048 INFO L158 Benchmark]: Witness Printer took 58.20ms. Allocated memory is still 218.1MB. Free memory was 168.8MB in the beginning and 165.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 10:38:03,049 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 119.5MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.88ms. Allocated memory is still 119.5MB. Free memory was 90.1MB in the beginning and 93.4MB in the end (delta: -3.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.85ms. Allocated memory is still 119.5MB. Free memory was 93.4MB in the beginning and 91.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.61ms. Allocated memory is still 119.5MB. Free memory was 91.7MB in the beginning and 90.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 225.20ms. Allocated memory is still 119.5MB. Free memory was 90.4MB in the beginning and 79.0MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 39757.38ms. Allocated memory was 119.5MB in the beginning and 218.1MB in the end (delta: 98.6MB). Free memory was 78.4MB in the beginning and 168.8MB in the end (delta: -90.4MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. * Witness Printer took 58.20ms. Allocated memory is still 218.1MB. Free memory was 168.8MB in the beginning and 165.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L36] i=1 VAL [a={-3:0}, b={-2:0}, c={-1:0}, i=1, N=3] [L36] COND TRUE i