./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 35987657 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-?-3598765 [2022-07-20 22:11:56,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:11:56,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:11:56,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:11:56,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:11:56,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:11:56,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:11:56,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:11:56,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:11:56,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:11:56,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:11:56,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:11:56,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:11:56,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:11:56,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:11:56,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:11:56,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:11:56,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:11:56,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:11:57,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:11:57,006 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:11:57,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:11:57,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:11:57,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:11:57,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:11:57,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:11:57,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:11:57,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:11:57,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:11:57,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:11:57,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:11:57,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:11:57,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:11:57,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:11:57,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:11:57,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:11:57,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:11:57,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:11:57,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:11:57,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:11:57,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:11:57,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:11:57,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:11:57,045 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:11:57,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:11:57,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:11:57,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:11:57,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:11:57,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:11:57,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:11:57,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:11:57,048 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:11:57,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:11:57,048 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:11:57,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:11:57,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:11:57,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:11:57,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:11:57,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:11:57,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:11:57,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:11:57,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:11:57,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:11:57,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:11:57,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:11:57,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:11:57,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:11:57,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:11:57,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:11:57,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:11:57,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:11:57,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:11:57,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:11:57,052 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:11:57,052 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:11:57,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:11:57,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2022-07-20 22:11:57,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:11:57,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:11:57,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:11:57,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:11:57,269 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:11:57,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/pcompf.c [2022-07-20 22:11:57,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45b51c1c/3ca4180b693f4b78b8dd3984fac2a4fe/FLAGbae1dbff1 [2022-07-20 22:11:57,676 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:11:57,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/pcompf.c [2022-07-20 22:11:57,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45b51c1c/3ca4180b693f4b78b8dd3984fac2a4fe/FLAGbae1dbff1 [2022-07-20 22:11:58,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45b51c1c/3ca4180b693f4b78b8dd3984fac2a4fe [2022-07-20 22:11:58,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:11:58,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:11:58,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:11:58,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:11:58,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:11:58,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1b8242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58, skipping insertion in model container [2022-07-20 22:11:58,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:11:58,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:11:58,209 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] [2022-07-20 22:11:58,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:11:58,230 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:11:58,238 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] [2022-07-20 22:11:58,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:11:58,253 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:11:58,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58 WrapperNode [2022-07-20 22:11:58,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:11:58,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:11:58,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:11:58,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:11:58,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,279 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2022-07-20 22:11:58,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:11:58,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:11:58,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:11:58,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:11:58,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:11:58,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:11:58,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:11:58,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:11:58,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (1/1) ... [2022-07-20 22:11:58,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:11:58,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:11:58,325 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) [2022-07-20 22:11:58,331 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 [2022-07-20 22:11:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:11:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:11:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:11:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:11:58,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:11:58,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:11:58,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:11:58,422 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:11:58,424 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:11:58,597 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:11:58,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:11:58,602 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 22:11:58,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:11:58 BoogieIcfgContainer [2022-07-20 22:11:58,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:11:58,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:11:58,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:11:58,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:11:58,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:11:58" (1/3) ... [2022-07-20 22:11:58,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94ab50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:11:58, skipping insertion in model container [2022-07-20 22:11:58,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:11:58" (2/3) ... [2022-07-20 22:11:58,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94ab50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:11:58, skipping insertion in model container [2022-07-20 22:11:58,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:11:58" (3/3) ... [2022-07-20 22:11:58,611 INFO L111 eAbstractionObserver]: Analyzing ICFG pcompf.c [2022-07-20 22:11:58,622 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:11:58,623 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:11:58,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:11:58,662 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@12f38142, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f2b328b [2022-07-20 22:11:58,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:11:58,666 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) [2022-07-20 22:11:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 22:11:58,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:11:58,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:11:58,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:11:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:11:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2022-07-20 22:11:58,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:11:58,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341922615] [2022-07-20 22:11:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:11:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:11:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:11:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:11:58,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:11:58,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341922615] [2022-07-20 22:11:58,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341922615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:11:58,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:11:58,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:11:58,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591545524] [2022-07-20 22:11:58,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:11:58,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 22:11:58,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:11:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 22:11:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 22:11:58,855 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) [2022-07-20 22:11:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:11:58,865 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-07-20 22:11:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 22:11:58,867 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 [2022-07-20 22:11:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:11:58,872 INFO L225 Difference]: With dead ends: 44 [2022-07-20 22:11:58,873 INFO L226 Difference]: Without dead ends: 20 [2022-07-20 22:11:58,875 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 [2022-07-20 22:11:58,878 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 [2022-07-20 22:11:58,879 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] [2022-07-20 22:11:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-20 22:11:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-20 22:11:58,900 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) [2022-07-20 22:11:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-20 22:11:58,902 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-07-20 22:11:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:11:58,902 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-20 22:11:58,903 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) [2022-07-20 22:11:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-20 22:11:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 22:11:58,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:11:58,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:11:58,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:11:58,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:11:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:11:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2022-07-20 22:11:58,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:11:58,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329452610] [2022-07-20 22:11:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:11:58,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:11:58,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:11:58,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238872166] [2022-07-20 22:11:58,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:11:58,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:11:58,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:11:58,933 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) [2022-07-20 22:11:58,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:11:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:11:59,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 22:11:59,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:11:59,176 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-07-20 22:11:59,177 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 [2022-07-20 22:11:59,192 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 [2022-07-20 22:11:59,216 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 [2022-07-20 22:11:59,235 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 [2022-07-20 22:11:59,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:11:59,878 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-20 22:11:59,879 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 55 treesize of output 24 [2022-07-20 22:11:59,896 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 [2022-07-20 22:11:59,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:11:59,968 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 26 [2022-07-20 22:12:00,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:00,012 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-20 22:12:00,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 26 [2022-07-20 22:12:00,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:00,075 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 55 treesize of output 16 [2022-07-20 22:12:00,084 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 [2022-07-20 22:12:00,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:00,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:00,103 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 16 [2022-07-20 22:12:00,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:00,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:00,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 5 [2022-07-20 22:12:00,129 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 [2022-07-20 22:12:00,384 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-20 22:12:00,384 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 50 treesize of output 31 [2022-07-20 22:12:00,396 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 [2022-07-20 22:12:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:12:00,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:12:00,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:00,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329452610] [2022-07-20 22:12:00,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:00,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238872166] [2022-07-20 22:12:00,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238872166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:12:00,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:12:00,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:12:00,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851778916] [2022-07-20 22:12:00,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:12:00,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:12:00,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:00,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:12:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:12:00,517 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) [2022-07-20 22:12:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:00,567 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-07-20 22:12:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:12:00,567 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 [2022-07-20 22:12:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:00,568 INFO L225 Difference]: With dead ends: 39 [2022-07-20 22:12:00,568 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 22:12:00,568 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 [2022-07-20 22:12:00,569 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 [2022-07-20 22:12:00,570 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] [2022-07-20 22:12:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 22:12:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-07-20 22:12:00,573 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) [2022-07-20 22:12:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-20 22:12:00,574 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 14 [2022-07-20 22:12:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:00,574 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-20 22:12:00,575 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) [2022-07-20 22:12:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-20 22:12:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 22:12:00,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:00,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:12:00,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 22:12:00,793 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 [2022-07-20 22:12:00,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:00,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1850906398, now seen corresponding path program 1 times [2022-07-20 22:12:00,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:00,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782014997] [2022-07-20 22:12:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:00,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:00,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:00,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236494434] [2022-07-20 22:12:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:00,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:00,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:00,816 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) [2022-07-20 22:12:00,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:12:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:12:00,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:12:00,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:12:00,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:12:00,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:00,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782014997] [2022-07-20 22:12:00,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:00,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236494434] [2022-07-20 22:12:00,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236494434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:12:00,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:12:00,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:12:00,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657272948] [2022-07-20 22:12:00,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:12:00,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:12:00,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:00,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:12:00,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:12:00,886 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) [2022-07-20 22:12:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:00,942 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-07-20 22:12:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:12:00,942 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 [2022-07-20 22:12:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:00,943 INFO L225 Difference]: With dead ends: 62 [2022-07-20 22:12:00,943 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 22:12:00,944 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 [2022-07-20 22:12:00,944 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 [2022-07-20 22:12:00,945 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] [2022-07-20 22:12:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 22:12:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2022-07-20 22:12:00,948 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) [2022-07-20 22:12:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-20 22:12:00,949 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2022-07-20 22:12:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:00,949 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-20 22:12:00,950 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) [2022-07-20 22:12:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-20 22:12:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 22:12:00,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:00,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:12:00,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:01,170 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 [2022-07-20 22:12:01,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1060218526, now seen corresponding path program 1 times [2022-07-20 22:12:01,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:01,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949447293] [2022-07-20 22:12:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:01,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:01,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555365790] [2022-07-20 22:12:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:01,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:01,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:01,191 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) [2022-07-20 22:12:01,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:12:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:12:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:12:01,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:12:01,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:12:01,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:01,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949447293] [2022-07-20 22:12:01,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:01,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555365790] [2022-07-20 22:12:01,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555365790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:01,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:01,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-20 22:12:01,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262132518] [2022-07-20 22:12:01,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:01,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:12:01,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:01,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:12:01,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:12:01,272 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) [2022-07-20 22:12:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:01,336 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-20 22:12:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 22:12:01,336 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 [2022-07-20 22:12:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:01,337 INFO L225 Difference]: With dead ends: 53 [2022-07-20 22:12:01,337 INFO L226 Difference]: Without dead ends: 44 [2022-07-20 22:12:01,337 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 [2022-07-20 22:12:01,338 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 [2022-07-20 22:12:01,338 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] [2022-07-20 22:12:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-20 22:12:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-07-20 22:12:01,341 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) [2022-07-20 22:12:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-20 22:12:01,342 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2022-07-20 22:12:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:01,342 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-20 22:12:01,342 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) [2022-07-20 22:12:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-20 22:12:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 22:12:01,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:01,343 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:12:01,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:01,560 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 [2022-07-20 22:12:01,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1120615462, now seen corresponding path program 1 times [2022-07-20 22:12:01,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:01,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645002474] [2022-07-20 22:12:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:01,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:01,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:01,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876396244] [2022-07-20 22:12:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:01,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:01,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:01,575 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) [2022-07-20 22:12:01,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:12:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:12:01,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:12:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:12:01,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:12:01,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:01,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645002474] [2022-07-20 22:12:01,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:01,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876396244] [2022-07-20 22:12:01,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876396244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:12:01,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:12:01,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:12:01,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120219994] [2022-07-20 22:12:01,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:12:01,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:12:01,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:01,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:12:01,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:12:01,665 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) [2022-07-20 22:12:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:01,724 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-20 22:12:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:12:01,724 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 [2022-07-20 22:12:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:01,726 INFO L225 Difference]: With dead ends: 48 [2022-07-20 22:12:01,726 INFO L226 Difference]: Without dead ends: 32 [2022-07-20 22:12:01,727 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 [2022-07-20 22:12:01,729 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 [2022-07-20 22:12:01,730 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] [2022-07-20 22:12:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-20 22:12:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-20 22:12:01,737 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) [2022-07-20 22:12:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-20 22:12:01,738 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2022-07-20 22:12:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:01,738 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-20 22:12:01,738 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) [2022-07-20 22:12:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-20 22:12:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 22:12:01,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:01,739 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] [2022-07-20 22:12:01,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:01,956 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 [2022-07-20 22:12:01,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:01,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:01,956 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2022-07-20 22:12:01,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:01,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446928663] [2022-07-20 22:12:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:01,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:01,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:01,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183020736] [2022-07-20 22:12:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:01,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:01,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:01,978 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) [2022-07-20 22:12:01,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:12:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:12:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 22:12:02,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:02,046 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 [2022-07-20 22:12:02,108 INFO L356 Elim1Store]: treesize reduction 78, result has 41.4 percent of original size [2022-07-20 22:12:02,109 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 [2022-07-20 22:12:02,119 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 [2022-07-20 22:12:02,129 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 [2022-07-20 22:12:02,139 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 [2022-07-20 22:12:03,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:03,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:03,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:03,011 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 19 [2022-07-20 22:12:03,014 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 [2022-07-20 22:12:03,017 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 [2022-07-20 22:12:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:03,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:03,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:03,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:03,495 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 19 [2022-07-20 22:12:03,498 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 [2022-07-20 22:12:03,548 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 [2022-07-20 22:12:03,604 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 [2022-07-20 22:12:03,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:03,740 INFO L356 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2022-07-20 22:12:03,740 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 179 treesize of output 184 [2022-07-20 22:12:03,767 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 [2022-07-20 22:12:03,771 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 [2022-07-20 22:12:03,793 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 [2022-07-20 22:12:03,828 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 [2022-07-20 22:12:03,875 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 [2022-07-20 22:12:03,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:03,903 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 [2022-07-20 22:12:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:12:03,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:12:04,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:04,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446928663] [2022-07-20 22:12:04,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:04,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183020736] [2022-07-20 22:12:04,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183020736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:04,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:04,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-20 22:12:04,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016876532] [2022-07-20 22:12:04,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:04,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 22:12:04,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 22:12:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=151, Unknown=1, NotChecked=0, Total=210 [2022-07-20 22:12:04,059 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) [2022-07-20 22:12:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:04,153 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-07-20 22:12:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:12:04,154 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 [2022-07-20 22:12:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:04,154 INFO L225 Difference]: With dead ends: 52 [2022-07-20 22:12:04,154 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 22:12:04,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=218, Unknown=1, NotChecked=0, Total=306 [2022-07-20 22:12:04,155 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:12:04,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 155 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 88 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-07-20 22:12:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 22:12:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2022-07-20 22:12:04,158 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) [2022-07-20 22:12:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-20 22:12:04,158 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2022-07-20 22:12:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:04,158 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-20 22:12:04,158 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) [2022-07-20 22:12:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-20 22:12:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 22:12:04,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:04,159 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] [2022-07-20 22:12:04,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:04,359 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 [2022-07-20 22:12:04,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash 859342364, now seen corresponding path program 2 times [2022-07-20 22:12:04,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:04,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217739306] [2022-07-20 22:12:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:04,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:04,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:04,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452985443] [2022-07-20 22:12:04,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:12:04,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:04,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:04,395 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) [2022-07-20 22:12:04,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:12:04,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:12:04,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:12:04,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:12:04,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:12:04,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:12:04,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:04,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217739306] [2022-07-20 22:12:04,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:04,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452985443] [2022-07-20 22:12:04,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452985443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:04,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:04,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-20 22:12:04,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753558438] [2022-07-20 22:12:04,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:04,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:12:04,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:04,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:12:04,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:12:04,513 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) [2022-07-20 22:12:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:04,603 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-07-20 22:12:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:12:04,604 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 [2022-07-20 22:12:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:04,605 INFO L225 Difference]: With dead ends: 81 [2022-07-20 22:12:04,605 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 22:12:04,605 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 [2022-07-20 22:12:04,605 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-07-20 22:12:04,606 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] [2022-07-20 22:12:04,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 22:12:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 42. [2022-07-20 22:12:04,609 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) [2022-07-20 22:12:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-20 22:12:04,609 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2022-07-20 22:12:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:04,610 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-20 22:12:04,610 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) [2022-07-20 22:12:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-20 22:12:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 22:12:04,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:04,610 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] [2022-07-20 22:12:04,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:04,823 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 [2022-07-20 22:12:04,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash 803751580, now seen corresponding path program 3 times [2022-07-20 22:12:04,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:04,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466786109] [2022-07-20 22:12:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:04,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:04,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:04,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242835940] [2022-07-20 22:12:04,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:12:04,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:04,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:04,838 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) [2022-07-20 22:12:04,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 22:12:04,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 22:12:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:12:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:12:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:12:04,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:12:04,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:04,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466786109] [2022-07-20 22:12:04,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:04,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242835940] [2022-07-20 22:12:04,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242835940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:04,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:04,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-20 22:12:04,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895613796] [2022-07-20 22:12:04,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:04,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:12:04,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:12:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:12:04,959 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) [2022-07-20 22:12:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:05,065 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-07-20 22:12:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 22:12:05,066 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 [2022-07-20 22:12:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:05,067 INFO L225 Difference]: With dead ends: 71 [2022-07-20 22:12:05,067 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 22:12:05,067 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 [2022-07-20 22:12:05,068 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 [2022-07-20 22:12:05,068 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] [2022-07-20 22:12:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 22:12:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2022-07-20 22:12:05,075 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) [2022-07-20 22:12:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-07-20 22:12:05,076 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2022-07-20 22:12:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:05,076 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-07-20 22:12:05,076 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) [2022-07-20 22:12:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-07-20 22:12:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 22:12:05,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:05,080 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] [2022-07-20 22:12:05,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:05,295 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 [2022-07-20 22:12:05,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:05,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:05,296 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2022-07-20 22:12:05,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:05,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636701758] [2022-07-20 22:12:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:05,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:05,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546115973] [2022-07-20 22:12:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:05,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:05,328 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) [2022-07-20 22:12:05,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 22:12:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:12:05,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 22:12:05,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:05,407 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:12:05,408 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 [2022-07-20 22:12:05,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:05,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:05,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:05,424 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 [2022-07-20 22:12:05,428 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 [2022-07-20 22:12:05,431 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 [2022-07-20 22:12:05,465 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:12:05,465 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 [2022-07-20 22:12:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:05,524 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:12:05,524 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 [2022-07-20 22:12:05,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:05,551 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:12:05,551 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 [2022-07-20 22:12:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:12:05,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:05,825 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_488 Int) (v_ArrVal_487 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_487))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse1 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_488)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|)))) 1)) is different from false [2022-07-20 22:12:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-20 22:12:05,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:05,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636701758] [2022-07-20 22:12:05,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:05,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546115973] [2022-07-20 22:12:05,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546115973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:05,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:05,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2022-07-20 22:12:05,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600779307] [2022-07-20 22:12:05,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:05,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 22:12:05,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:05,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 22:12:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2022-07-20 22:12:05,837 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) [2022-07-20 22:12:06,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:06,127 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-07-20 22:12:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 22:12:06,128 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 [2022-07-20 22:12:06,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:06,129 INFO L225 Difference]: With dead ends: 55 [2022-07-20 22:12:06,129 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 22:12:06,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=406, Unknown=1, NotChecked=44, Total=600 [2022-07-20 22:12:06,129 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:12:06,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 157 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 101 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-07-20 22:12:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 22:12:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-07-20 22:12:06,132 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) [2022-07-20 22:12:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-07-20 22:12:06,133 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 24 [2022-07-20 22:12:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:06,133 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-07-20 22:12:06,133 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) [2022-07-20 22:12:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-07-20 22:12:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 22:12:06,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:06,133 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] [2022-07-20 22:12:06,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:06,351 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 [2022-07-20 22:12:06,351 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:06,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 4 times [2022-07-20 22:12:06,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:06,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32377337] [2022-07-20 22:12:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:06,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:06,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810977175] [2022-07-20 22:12:06,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:12:06,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:06,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:06,369 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) [2022-07-20 22:12:06,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 22:12:06,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:12:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:12:06,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 22:12:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:06,503 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-07-20 22:12:06,504 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 [2022-07-20 22:12:06,521 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 [2022-07-20 22:12:06,530 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 [2022-07-20 22:12:06,539 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 [2022-07-20 22:12:07,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:07,380 INFO L356 Elim1Store]: treesize reduction 24, result has 25.0 percent of original size [2022-07-20 22:12:07,380 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 113 [2022-07-20 22:12:07,388 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 [2022-07-20 22:12:07,413 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 [2022-07-20 22:12:07,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:07,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:07,440 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-20 22:12:07,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 362 treesize of output 307 [2022-07-20 22:12:07,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:07,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:07,483 INFO L356 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2022-07-20 22:12:07,483 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 334 treesize of output 271 [2022-07-20 22:12:07,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-20 22:12:07,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-20 22:12:07,554 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 [2022-07-20 22:12:07,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:07,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:07,600 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-20 22:12:07,603 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 110 treesize of output 113 [2022-07-20 22:12:07,609 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 [2022-07-20 22:12:07,615 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 [2022-07-20 22:12:07,643 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 [2022-07-20 22:12:07,664 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 [2022-07-20 22:12:07,677 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 [2022-07-20 22:12:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:07,700 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 [2022-07-20 22:12:07,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:07,718 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 [2022-07-20 22:12:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:12:07,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:09,816 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 [2022-07-20 22:12:10,159 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 (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_68|)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |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))) is different from false [2022-07-20 22:12:10,448 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 [2022-07-20 22:12:10,464 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 [2022-07-20 22:12:10,498 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 [2022-07-20 22:12:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 9 not checked. [2022-07-20 22:12:10,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:10,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32377337] [2022-07-20 22:12:10,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:10,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810977175] [2022-07-20 22:12:10,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810977175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:10,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:10,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-07-20 22:12:10,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718562895] [2022-07-20 22:12:10,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:10,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 22:12:10,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:10,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 22:12:10,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=117, Unknown=6, NotChecked=130, Total=306 [2022-07-20 22:12:10,526 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) [2022-07-20 22:12:10,656 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 [2022-07-20 22:12:12,690 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|)))) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-07-20 22:12:12,695 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 [2022-07-20 22:12:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:12,774 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2022-07-20 22:12:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 22:12:12,774 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 [2022-07-20 22:12:12,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:12,775 INFO L225 Difference]: With dead ends: 91 [2022-07-20 22:12:12,775 INFO L226 Difference]: Without dead ends: 89 [2022-07-20 22:12:12,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=118, Invalid=323, Unknown=11, NotChecked=360, Total=812 [2022-07-20 22:12:12,776 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:12:12,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 123 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 201 Unchecked, 0.1s Time] [2022-07-20 22:12:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-20 22:12:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 47. [2022-07-20 22:12:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 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) [2022-07-20 22:12:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-07-20 22:12:12,782 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 26 [2022-07-20 22:12:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:12,782 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-07-20 22:12:12,782 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) [2022-07-20 22:12:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-07-20 22:12:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 22:12:12,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:12,783 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] [2022-07-20 22:12:12,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:12,999 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 [2022-07-20 22:12:12,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash -231193078, now seen corresponding path program 2 times [2022-07-20 22:12:13,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590132109] [2022-07-20 22:12:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:13,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:13,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137946949] [2022-07-20 22:12:13,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:12:13,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:13,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:13,013 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) [2022-07-20 22:12:13,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 22:12:13,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:12:13,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:12:13,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 22:12:13,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:12:13,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:12:13,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:13,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590132109] [2022-07-20 22:12:13,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:13,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137946949] [2022-07-20 22:12:13,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137946949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:13,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:13,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-20 22:12:13,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123548788] [2022-07-20 22:12:13,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:13,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:12:13,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:13,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:12:13,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:12:13,180 INFO L87 Difference]: Start difference. First operand 47 states and 52 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) [2022-07-20 22:12:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:13,292 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-07-20 22:12:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:12:13,292 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 [2022-07-20 22:12:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:13,293 INFO L225 Difference]: With dead ends: 72 [2022-07-20 22:12:13,293 INFO L226 Difference]: Without dead ends: 48 [2022-07-20 22:12:13,293 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 [2022-07-20 22:12:13,293 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:12:13,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:12:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-20 22:12:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-07-20 22:12:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 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) [2022-07-20 22:12:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-20 22:12:13,297 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 28 [2022-07-20 22:12:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:13,297 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-20 22:12:13,297 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) [2022-07-20 22:12:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-20 22:12:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 22:12:13,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:13,298 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:12:13,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:13,498 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 [2022-07-20 22:12:13,498 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:13,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:13,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1587482582, now seen corresponding path program 5 times [2022-07-20 22:12:13,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:13,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047639423] [2022-07-20 22:12:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:13,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:13,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:13,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813500658] [2022-07-20 22:12:13,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 22:12:13,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:13,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:13,516 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) [2022-07-20 22:12:13,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 22:12:13,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 22:12:13,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:12:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:12:13,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:12:13,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:12:13,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047639423] [2022-07-20 22:12:13,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:13,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813500658] [2022-07-20 22:12:13,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813500658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:13,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:13,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-20 22:12:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802790686] [2022-07-20 22:12:13,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:13,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 22:12:13,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:13,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 22:12:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:12:13,725 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:12:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:13,868 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2022-07-20 22:12:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 22:12:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-20 22:12:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:13,869 INFO L225 Difference]: With dead ends: 102 [2022-07-20 22:12:13,869 INFO L226 Difference]: Without dead ends: 82 [2022-07-20 22:12:13,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:12:13,869 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:12:13,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 58 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:12:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-20 22:12:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2022-07-20 22:12:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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) [2022-07-20 22:12:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-07-20 22:12:13,875 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 28 [2022-07-20 22:12:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:13,875 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-07-20 22:12:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:12:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-07-20 22:12:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 22:12:13,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:13,876 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] [2022-07-20 22:12:13,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:14,077 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 [2022-07-20 22:12:14,077 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 3 times [2022-07-20 22:12:14,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:14,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019848363] [2022-07-20 22:12:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:14,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:14,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:14,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187703881] [2022-07-20 22:12:14,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:12:14,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:14,098 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) [2022-07-20 22:12:14,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 22:12:14,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 22:12:14,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:12:14,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-20 22:12:14,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:14,570 INFO L356 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2022-07-20 22:12:14,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 226 treesize of output 790 [2022-07-20 22:12:14,599 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 17 treesize of output 15 [2022-07-20 22:12:14,615 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 17 treesize of output 15 [2022-07-20 22:12:14,629 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-07-20 22:12:14,649 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 25 treesize of output 22 [2022-07-20 22:12:14,861 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 [2022-07-20 22:12:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 395 [2022-07-20 22:12:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:16,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 390 [2022-07-20 22:12:16,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:16,998 INFO L356 Elim1Store]: treesize reduction 49, result has 14.0 percent of original size [2022-07-20 22:12:16,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 298 treesize of output 548 [2022-07-20 22:12:17,360 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 345 treesize of output 343 [2022-07-20 22:12:33,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:33,054 INFO L356 Elim1Store]: treesize reduction 47, result has 2.1 percent of original size [2022-07-20 22:12:33,054 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 392 treesize of output 249 [2022-07-20 22:12:33,107 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 [2022-07-20 22:12:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:36,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:36,305 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-20 22:12:36,306 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 223 treesize of output 180 [2022-07-20 22:12:36,312 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 [2022-07-20 22:12:36,351 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 [2022-07-20 22:12:36,389 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 [2022-07-20 22:12:37,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:37,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:37,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:37,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:37,096 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 63 treesize of output 24 [2022-07-20 22:12:37,133 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 [2022-07-20 22:12:37,281 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 [2022-07-20 22:12:37,335 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 [2022-07-20 22:12:37,496 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 [2022-07-20 22:12:37,536 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:12:37,536 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 [2022-07-20 22:12:37,580 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:12:37,580 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 [2022-07-20 22:12:37,601 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:12:37,601 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 [2022-07-20 22:12:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:37,636 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:12:37,637 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 [2022-07-20 22:12:37,674 INFO L356 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2022-07-20 22:12:37,675 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 30 treesize of output 42 [2022-07-20 22:12:37,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:37,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:12:37,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:37,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-07-20 22:12:37,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:37,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:37,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:37,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 42 [2022-07-20 22:12:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:12:37,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:40,168 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_795 Int)) (= (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_795))) (+ (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)) (<= |ULTIMATE.start_main_~i~0#1| 1))) is different from false [2022-07-20 22:12:40,671 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int) (v_ArrVal_795 Int) (v_ArrVal_793 Int)) (or (<= |v_ULTIMATE.start_main_~i~0#1_113| 1) (= (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_793) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_113|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_795))) (+ (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 [2022-07-20 22:12:41,179 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int) (v_ArrVal_795 Int) (v_ArrVal_793 Int)) (or (<= |v_ULTIMATE.start_main_~i~0#1_113| 1) (= (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_793) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_113|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_795))) (+ (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 [2022-07-20 22:12:42,222 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int) (v_ArrVal_795 Int) (v_ArrVal_793 Int) (v_ArrVal_792 (Array Int Int))) (or (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_792))) (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_793) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_113|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_795))) (+ (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) (<= |v_ULTIMATE.start_main_~i~0#1_113| 1))) is different from false [2022-07-20 22:12:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2022-07-20 22:12:42,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019848363] [2022-07-20 22:12:42,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187703881] [2022-07-20 22:12:42,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187703881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:42,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:42,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2022-07-20 22:12:42,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372659575] [2022-07-20 22:12:42,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:42,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-20 22:12:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:42,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-20 22:12:42,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=454, Unknown=4, NotChecked=188, Total=756 [2022-07-20 22:12:42,247 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-07-20 22:12:44,341 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 ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_795 Int)) (= (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_795))) (+ (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)) (<= |ULTIMATE.start_main_~i~0#1| 1))) (= 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) (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) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-07-20 22:12:46,343 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 ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_795 Int)) (= (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_795))) (+ (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)) (<= |ULTIMATE.start_main_~i~0#1| 1))) (= 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)) is different from false [2022-07-20 22:12:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:46,616 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-07-20 22:12:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 22:12:46,617 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 [2022-07-20 22:12:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:46,617 INFO L225 Difference]: With dead ends: 73 [2022-07-20 22:12:46,617 INFO L226 Difference]: Without dead ends: 71 [2022-07-20 22:12:46,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=241, Invalid=899, Unknown=6, NotChecked=414, Total=1560 [2022-07-20 22:12:46,618 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:12:46,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 113 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 97 Invalid, 0 Unknown, 222 Unchecked, 0.1s Time] [2022-07-20 22:12:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-20 22:12:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2022-07-20 22:12:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 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) [2022-07-20 22:12:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-07-20 22:12:46,624 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 30 [2022-07-20 22:12:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:46,624 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-07-20 22:12:46,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-07-20 22:12:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-07-20 22:12:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 22:12:46,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:46,637 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] [2022-07-20 22:12:46,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:46,857 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 [2022-07-20 22:12:46,857 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:46,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 6 times [2022-07-20 22:12:46,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:46,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293910816] [2022-07-20 22:12:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:46,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:46,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:46,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495679269] [2022-07-20 22:12:46,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 22:12:46,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:46,882 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) [2022-07-20 22:12:46,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 22:12:46,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-20 22:12:46,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:12:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 22:12:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:12:47,005 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 [2022-07-20 22:12:47,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:47,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:47,017 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 22:12:47,017 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-20 22:12:47,020 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 [2022-07-20 22:12:47,043 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 [2022-07-20 22:12:47,066 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 [2022-07-20 22:12:47,087 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 [2022-07-20 22:12:47,124 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 14 treesize of output 16 [2022-07-20 22:12:47,132 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 [2022-07-20 22:12:47,145 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 [2022-07-20 22:12:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:47,203 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 [2022-07-20 22:12:47,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:47,226 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 [2022-07-20 22:12:47,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:12:47,249 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 [2022-07-20 22:12:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:12:47,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:12:47,628 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_893 (Array Int Int)) (v_ArrVal_896 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_893) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_896) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (<= 4 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2022-07-20 22:12:47,632 WARN L833 $PredicateComparison]: unable to prove that (or (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_893 (Array Int Int)) (v_ArrVal_896 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_893) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_896) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0))) is different from false [2022-07-20 22:12:47,640 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_893 (Array Int Int)) (v_ArrVal_896 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_893) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_896) |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|)) is different from false [2022-07-20 22:12:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 9 not checked. [2022-07-20 22:12:47,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:12:47,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293910816] [2022-07-20 22:12:47,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:12:47,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495679269] [2022-07-20 22:12:47,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495679269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:12:47,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:12:47,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 33 [2022-07-20 22:12:47,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002832281] [2022-07-20 22:12:47,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:12:47,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 22:12:47,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:12:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 22:12:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=597, Unknown=4, NotChecked=174, Total=1056 [2022-07-20 22:12:47,651 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 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) [2022-07-20 22:12:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:12:47,838 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2022-07-20 22:12:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 22:12:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 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) Word has length 32 [2022-07-20 22:12:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:12:47,840 INFO L225 Difference]: With dead ends: 142 [2022-07-20 22:12:47,840 INFO L226 Difference]: Without dead ends: 140 [2022-07-20 22:12:47,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=962, Unknown=4, NotChecked=216, Total=1560 [2022-07-20 22:12:47,841 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:12:47,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 97 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 182 Unchecked, 0.1s Time] [2022-07-20 22:12:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-20 22:12:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 93. [2022-07-20 22:12:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1956521739130435) internal successors, (110), 92 states have internal predecessors, (110), 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) [2022-07-20 22:12:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2022-07-20 22:12:47,850 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 32 [2022-07-20 22:12:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:12:47,851 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2022-07-20 22:12:47,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 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) [2022-07-20 22:12:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2022-07-20 22:12:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 22:12:47,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:12:47,852 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] [2022-07-20 22:12:47,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:48,067 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 [2022-07-20 22:12:48,068 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:12:48,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:12:48,068 INFO L85 PathProgramCache]: Analyzing trace with hash 505093188, now seen corresponding path program 4 times [2022-07-20 22:12:48,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:12:48,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488172290] [2022-07-20 22:12:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:12:48,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:12:48,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:12:48,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602177876] [2022-07-20 22:12:48,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:12:48,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:12:48,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:12:48,080 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) [2022-07-20 22:12:48,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 22:12:48,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:12:48,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-20 22:12:48,185 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-20 22:12:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:12:48,262 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-20 22:12:48,262 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-20 22:12:48,263 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-20 22:12:48,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 22:12:48,499 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 [2022-07-20 22:12:48,502 INFO L356 BasicCegarLoop]: Path program histogram: [6, 4, 1, 1, 1, 1, 1] [2022-07-20 22:12:48,504 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-20 22:12:48,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:12:48 BoogieIcfgContainer [2022-07-20 22:12:48,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-20 22:12:48,532 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-20 22:12:48,533 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-20 22:12:48,533 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-20 22:12:48,533 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:11:58" (3/4) ... [2022-07-20 22:12:48,534 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-20 22:12:48,564 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-20 22:12:48,565 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-20 22:12:48,565 INFO L158 Benchmark]: Toolchain (without parser) took 50495.55ms. Allocated memory was 90.2MB in the beginning and 201.3MB in the end (delta: 111.1MB). Free memory was 55.2MB in the beginning and 87.8MB in the end (delta: -32.6MB). Peak memory consumption was 77.1MB. Max. memory is 16.1GB. [2022-07-20 22:12:48,565 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 90.2MB. Free memory was 59.7MB in the beginning and 59.7MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:12:48,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.21ms. Allocated memory is still 90.2MB. Free memory was 55.0MB in the beginning and 64.8MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-20 22:12:48,566 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.13ms. Allocated memory is still 90.2MB. Free memory was 64.8MB in the beginning and 63.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:12:48,566 INFO L158 Benchmark]: Boogie Preprocessor took 18.11ms. Allocated memory is still 90.2MB. Free memory was 63.2MB in the beginning and 61.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 22:12:48,566 INFO L158 Benchmark]: RCFGBuilder took 305.15ms. Allocated memory is still 90.2MB. Free memory was 61.9MB in the beginning and 50.7MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-20 22:12:48,566 INFO L158 Benchmark]: TraceAbstraction took 49927.27ms. Allocated memory was 90.2MB in the beginning and 201.3MB in the end (delta: 111.1MB). Free memory was 50.1MB in the beginning and 91.0MB in the end (delta: -40.9MB). Peak memory consumption was 71.7MB. Max. memory is 16.1GB. [2022-07-20 22:12:48,566 INFO L158 Benchmark]: Witness Printer took 32.28ms. Allocated memory is still 201.3MB. Free memory was 91.0MB in the beginning and 87.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 22:12:48,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 90.2MB. Free memory was 59.7MB in the beginning and 59.7MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.21ms. Allocated memory is still 90.2MB. Free memory was 55.0MB in the beginning and 64.8MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.13ms. Allocated memory is still 90.2MB. Free memory was 64.8MB in the beginning and 63.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.11ms. Allocated memory is still 90.2MB. Free memory was 63.2MB in the beginning and 61.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 305.15ms. Allocated memory is still 90.2MB. Free memory was 61.9MB in the beginning and 50.7MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 49927.27ms. Allocated memory was 90.2MB in the beginning and 201.3MB in the end (delta: 111.1MB). Free memory was 50.1MB in the beginning and 91.0MB in the end (delta: -40.9MB). Peak memory consumption was 71.7MB. Max. memory is 16.1GB. * Witness Printer took 32.28ms. Allocated memory is still 201.3MB. Free memory was 91.0MB in the beginning and 87.8MB 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={4:0}, b={6:0}, c={5:0}, i=1, N=3] [L36] COND TRUE i